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Finding the Fourth Proportional to 6,447.28, 8,897.19 and 5,918.31

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Solution

The fourth proportional to 6,447.28, 8,897.19 and 5,918.31 is: 8,167.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,447.28 : 8,897.19 = 5,918.31 : x
  2. Step 2: Convert to fraction form
    6,447.28/8,897.19 = 5,918.31/x
  3. Step 3: Cross multiply
    6,447.28x = 8,897.19 × 5,918.31
  4. Step 4: Simplify right side
    6,447.28x = 52,656,328.55
  5. Step 5: Solve for x
    x = 52,656,328.55/6,447.28
  6. Step 6: Final answer
    x = 8,167.22

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