Finding the Fourth Proportional to 13,397.29, 18,485.89 and 8,088.55

Step by Step Solution

1. Step 1: Write the proportion equation
   13,397.29 : 18,485.89 = 8,088.55 : x
2. Step 2: Convert to fraction form
   13,397.29/18,485.89 = 8,088.55/x
3. Step 3: Cross multiply
   13,397.29x = 18,485.89 × 8,088.55
4. Step 4: Simplify right side
   13,397.29x = 149,524,045.56
5. Step 5: Solve for x
   x = 149,524,045.56/13,397.29
6. Step 6: Final answer
   x = 11,160.77