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Finding the Fourth Proportional to 8,645.28, 12,955.68 and 4,265.88

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Solution

The fourth proportional to 8,645.28, 12,955.68 and 4,265.88 is: 6,392.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,645.28 : 12,955.68 = 4,265.88 : x
  2. Step 2: Convert to fraction form
    8,645.28/12,955.68 = 4,265.88/x
  3. Step 3: Cross multiply
    8,645.28x = 12,955.68 × 4,265.88
  4. Step 4: Simplify right side
    8,645.28x = 55,267,376.20
  5. Step 5: Solve for x
    x = 55,267,376.20/8,645.28
  6. Step 6: Final answer
    x = 6,392.78

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