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Finding the Fourth Proportional to 398,655,606.20, 597,983,409.40 and 398,655,606.20

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Solution

The fourth proportional to 398,655,606.20, 597,983,409.40 and 398,655,606.20 is: 597,983,409.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,655,606.20 : 597,983,409.40 = 398,655,606.20 : x
  2. Step 2: Convert to fraction form
    398,655,606.20/597,983,409.40 = 398,655,606.20/x
  3. Step 3: Cross multiply
    398,655,606.20x = 597,983,409.40 × 398,655,606.20
  4. Step 4: Simplify right side
    398,655,606.20x = 238,389,438,571,899,776
  5. Step 5: Solve for x
    x = 238,389,438,571,899,776/398,655,606.20
  6. Step 6: Final answer
    x = 597,983,409.40

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