Finding the Fourth Proportional to 13,148.16, 18,137.15 and 8,604.53

Step by Step Solution

1. Step 1: Write the proportion equation
   13,148.16 : 18,137.15 = 8,604.53 : x
2. Step 2: Convert to fraction form
   13,148.16/18,137.15 = 8,604.53/x
3. Step 3: Cross multiply
   13,148.16x = 18,137.15 × 8,604.53
4. Step 4: Simplify right side
   13,148.16x = 156,061,617.86
5. Step 5: Solve for x
   x = 156,061,617.86/13,148.16
6. Step 6: Final answer
   x = 11,869.47