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Finding the Fourth Proportional to 12,999.87, 19,499.79 and 4,234.77

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Solution

The fourth proportional to 12,999.87, 19,499.79 and 4,234.77 is: 6,352.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,999.87 : 19,499.79 = 4,234.77 : x
  2. Step 2: Convert to fraction form
    12,999.87/19,499.79 = 4,234.77/x
  3. Step 3: Cross multiply
    12,999.87x = 19,499.79 × 4,234.77
  4. Step 4: Simplify right side
    12,999.87x = 82,577,125.70
  5. Step 5: Solve for x
    x = 82,577,125.70/12,999.87
  6. Step 6: Final answer
    x = 6,352.15

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