Finding the Fourth Proportional to 12,737.72, 17,578.86 and 7,149.08

Step by Step Solution

1. Step 1: Write the proportion equation
   12,737.72 : 17,578.86 = 7,149.08 : x
2. Step 2: Convert to fraction form
   12,737.72/17,578.86 = 7,149.08/x
3. Step 3: Cross multiply
   12,737.72x = 17,578.86 × 7,149.08
4. Step 4: Simplify right side
   12,737.72x = 125,672,676.45
5. Step 5: Solve for x
   x = 125,672,676.45/12,737.72
6. Step 6: Final answer
   x = 9,866.18