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Finding the Fourth Proportional to 525,606.47, 787,871.10 and 398,978.65

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Solution

The fourth proportional to 525,606.47, 787,871.10 and 398,978.65 is: 598,059.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,606.47 : 787,871.10 = 398,978.65 : x
  2. Step 2: Convert to fraction form
    525,606.47/787,871.10 = 398,978.65/x
  3. Step 3: Cross multiply
    525,606.47x = 787,871.10 × 398,978.65
  4. Step 4: Simplify right side
    525,606.47x = 314,343,743,887.44
  5. Step 5: Solve for x
    x = 314,343,743,887.44/525,606.47
  6. Step 6: Final answer
    x = 598,059.13

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