Finding the Fourth Proportional to 9,134.17, 12,605.09 and 5,155.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,134.17 : 12,605.09 = 5,155.25 : x
2. Step 2: Convert to fraction form
   9,134.17/12,605.09 = 5,155.25/x
3. Step 3: Cross multiply
   9,134.17x = 12,605.09 × 5,155.25
4. Step 4: Simplify right side
   9,134.17x = 64,982,301.42
5. Step 5: Solve for x
   x = 64,982,301.42/9,134.17
6. Step 6: Final answer
   x = 7,114.20