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Finding the Fourth Proportional to 8,378.84, 12,569.88 and 3,184.31

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Solution

The fourth proportional to 8,378.84, 12,569.88 and 3,184.31 is: 4,777.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,378.84 : 12,569.88 = 3,184.31 : x
  2. Step 2: Convert to fraction form
    8,378.84/12,569.88 = 3,184.31/x
  3. Step 3: Cross multiply
    8,378.84x = 12,569.88 × 3,184.31
  4. Step 4: Simplify right side
    8,378.84x = 40,026,437.95
  5. Step 5: Solve for x
    x = 40,026,437.95/8,378.84
  6. Step 6: Final answer
    x = 4,777.08

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