Finding the Fourth Proportional to 11,439.53, 17,137.06 and 8,432.10

Step by Step Solution

1. Step 1: Write the proportion equation
   11,439.53 : 17,137.06 = 8,432.10 : x
2. Step 2: Convert to fraction form
   11,439.53/17,137.06 = 8,432.10/x
3. Step 3: Cross multiply
   11,439.53x = 17,137.06 × 8,432.10
4. Step 4: Simplify right side
   11,439.53x = 144,501,317.94
5. Step 5: Solve for x
   x = 144,501,317.94/11,439.53
6. Step 6: Final answer
   x = 12,631.76