Finding the Fourth Proportional to 8,706.18, 12,010.50 and 5,168.10

Step by Step Solution

1. Step 1: Write the proportion equation
   8,706.18 : 12,010.50 = 5,168.10 : x
2. Step 2: Convert to fraction form
   8,706.18/12,010.50 = 5,168.10/x
3. Step 3: Cross multiply
   8,706.18x = 12,010.50 × 5,168.10
4. Step 4: Simplify right side
   8,706.18x = 62,071,465.05
5. Step 5: Solve for x
   x = 62,071,465.05/8,706.18
6. Step 6: Final answer
   x = 7,129.59