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Finding the Fourth Proportional to 207,069.40, 310,895.70 and 128,337.40

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Solution

The fourth proportional to 207,069.40, 310,895.70 and 128,337.40 is: 192,686.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,069.40 : 310,895.70 = 128,337.40 : x
  2. Step 2: Convert to fraction form
    207,069.40/310,895.70 = 128,337.40/x
  3. Step 3: Cross multiply
    207,069.40x = 310,895.70 × 128,337.40
  4. Step 4: Simplify right side
    207,069.40x = 39,899,545,809.18
  5. Step 5: Solve for x
    x = 39,899,545,809.18/207,069.40
  6. Step 6: Final answer
    x = 192,686.83

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