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Finding the Fourth Proportional to 711,340.72, 981,613.80 and 388,988.16

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Solution

The fourth proportional to 711,340.72, 981,613.80 and 388,988.16 is: 536,783.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,340.72 : 981,613.80 = 388,988.16 : x
  2. Step 2: Convert to fraction form
    711,340.72/981,613.80 = 388,988.16/x
  3. Step 3: Cross multiply
    711,340.72x = 981,613.80 × 388,988.16
  4. Step 4: Simplify right side
    711,340.72x = 381,836,145,892.61
  5. Step 5: Solve for x
    x = 381,836,145,892.61/711,340.72
  6. Step 6: Final answer
    x = 536,783.76

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