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Finding the Fourth Proportional to 399,266.62, 550,979.35 and 217,969.72

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Solution

The fourth proportional to 399,266.62, 550,979.35 and 217,969.72 is: 300,793.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,266.62 : 550,979.35 = 217,969.72 : x
  2. Step 2: Convert to fraction form
    399,266.62/550,979.35 = 217,969.72/x
  3. Step 3: Cross multiply
    399,266.62x = 550,979.35 × 217,969.72
  4. Step 4: Simplify right side
    399,266.62x = 120,096,814,645.28
  5. Step 5: Solve for x
    x = 120,096,814,645.28/399,266.62
  6. Step 6: Final answer
    x = 300,793.53

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