Finding the Fourth Proportional to 9,133.72, 12,604.48 and 5,156.13

Step by Step Solution

1. Step 1: Write the proportion equation
   9,133.72 : 12,604.48 = 5,156.13 : x
2. Step 2: Convert to fraction form
   9,133.72/12,604.48 = 5,156.13/x
3. Step 3: Cross multiply
   9,133.72x = 12,604.48 × 5,156.13
4. Step 4: Simplify right side
   9,133.72x = 64,990,337.46
5. Step 5: Solve for x
   x = 64,990,337.46/9,133.72
6. Step 6: Final answer
   x = 7,115.43