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Finding the Fourth Proportional to 711,680.80, 982,095.07 and 405,855.61

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Solution

The fourth proportional to 711,680.80, 982,095.07 and 405,855.61 is: 560,066.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,680.80 : 982,095.07 = 405,855.61 : x
  2. Step 2: Convert to fraction form
    711,680.80/982,095.07 = 405,855.61/x
  3. Step 3: Cross multiply
    711,680.80x = 982,095.07 × 405,855.61
  4. Step 4: Simplify right side
    711,680.80x = 398,588,793,712.84
  5. Step 5: Solve for x
    x = 398,588,793,712.84/711,680.80
  6. Step 6: Final answer
    x = 560,066.81

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