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Finding the Fourth Proportional to 8,555.78, 12,840.15 and 4,176.02

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Solution

The fourth proportional to 8,555.78, 12,840.15 and 4,176.02 is: 6,267.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,555.78 : 12,840.15 = 4,176.02 : x
  2. Step 2: Convert to fraction form
    8,555.78/12,840.15 = 4,176.02/x
  3. Step 3: Cross multiply
    8,555.78x = 12,840.15 × 4,176.02
  4. Step 4: Simplify right side
    8,555.78x = 53,620,723.20
  5. Step 5: Solve for x
    x = 53,620,723.20/8,555.78
  6. Step 6: Final answer
    x = 6,267.19

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