Finding the Fourth Proportional to 8,706.29, 12,020.94 and 5,353.61

Step by Step Solution

1. Step 1: Write the proportion equation
   8,706.29 : 12,020.94 = 5,353.61 : x
2. Step 2: Convert to fraction form
   8,706.29/12,020.94 = 5,353.61/x
3. Step 3: Cross multiply
   8,706.29x = 12,020.94 × 5,353.61
4. Step 4: Simplify right side
   8,706.29x = 64,355,397.83
5. Step 5: Solve for x
   x = 64,355,397.83/8,706.29
6. Step 6: Final answer
   x = 7,391.83