Finding the Fourth Proportional to 8,113.16, 12,168.66 and 5,160.71

Step by Step Solution

1. Step 1: Write the proportion equation
   8,113.16 : 12,168.66 = 5,160.71 : x
2. Step 2: Convert to fraction form
   8,113.16/12,168.66 = 5,160.71/x
3. Step 3: Cross multiply
   8,113.16x = 12,168.66 × 5,160.71
4. Step 4: Simplify right side
   8,113.16x = 62,798,925.35
5. Step 5: Solve for x
   x = 62,798,925.35/8,113.16
6. Step 6: Final answer
   x = 7,740.38