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Finding the Fourth Proportional to 8,719.72, 13,087.80 and 3,178.42

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Solution

The fourth proportional to 8,719.72, 13,087.80 and 3,178.42 is: 4,770.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,719.72 : 13,087.80 = 3,178.42 : x
  2. Step 2: Convert to fraction form
    8,719.72/13,087.80 = 3,178.42/x
  3. Step 3: Cross multiply
    8,719.72x = 13,087.80 × 3,178.42
  4. Step 4: Simplify right side
    8,719.72x = 41,598,525.28
  5. Step 5: Solve for x
    x = 41,598,525.28/8,719.72
  6. Step 6: Final answer
    x = 4,770.63

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