Finding the Fourth Proportional to 9,411.57, 12,988.20 and 5,162.82

Step by Step Solution

1. Step 1: Write the proportion equation
   9,411.57 : 12,988.20 = 5,162.82 : x
2. Step 2: Convert to fraction form
   9,411.57/12,988.20 = 5,162.82/x
3. Step 3: Cross multiply
   9,411.57x = 12,988.20 × 5,162.82
4. Step 4: Simplify right side
   9,411.57x = 67,055,738.72
5. Step 5: Solve for x
   x = 67,055,738.72/9,411.57
6. Step 6: Final answer
   x = 7,124.82