Finding the Fourth Proportional to 9,131.09, 12,600.90 and 5,153.04

Step by Step Solution

1. Step 1: Write the proportion equation
   9,131.09 : 12,600.90 = 5,153.04 : x
2. Step 2: Convert to fraction form
   9,131.09/12,600.90 = 5,153.04/x
3. Step 3: Cross multiply
   9,131.09x = 12,600.90 × 5,153.04
4. Step 4: Simplify right side
   9,131.09x = 64,932,941.74
5. Step 5: Solve for x
   x = 64,932,941.74/9,131.09
6. Step 6: Final answer
   x = 7,111.20