Finding the Fourth Proportional to 12,437.84, 17,171.52 and 7,724.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,437.84 : 17,171.52 = 7,724.72 : x
2. Step 2: Convert to fraction form
   12,437.84/17,171.52 = 7,724.72/x
3. Step 3: Cross multiply
   12,437.84x = 17,171.52 × 7,724.72
4. Step 4: Simplify right side
   12,437.84x = 132,645,183.97
5. Step 5: Solve for x
   x = 132,645,183.97/12,437.84
6. Step 6: Final answer
   x = 10,664.65