Finding the Fourth Proportional to 9,165.59, 12,648.12 and 5,186.77

Step by Step Solution

1. Step 1: Write the proportion equation
   9,165.59 : 12,648.12 = 5,186.77 : x
2. Step 2: Convert to fraction form
   9,165.59/12,648.12 = 5,186.77/x
3. Step 3: Cross multiply
   9,165.59x = 12,648.12 × 5,186.77
4. Step 4: Simplify right side
   9,165.59x = 65,602,838.30
5. Step 5: Solve for x
   x = 65,602,838.30/9,165.59
6. Step 6: Final answer
   x = 7,157.51