Finding the Fourth Proportional to 8,706.92, 12,018.82 and 5,171.88

Step by Step Solution

1. Step 1: Write the proportion equation
   8,706.92 : 12,018.82 = 5,171.88 : x
2. Step 2: Convert to fraction form
   8,706.92/12,018.82 = 5,171.88/x
3. Step 3: Cross multiply
   8,706.92x = 12,018.82 × 5,171.88
4. Step 4: Simplify right side
   8,706.92x = 62,159,894.78
5. Step 5: Solve for x
   x = 62,159,894.78/8,706.92
6. Step 6: Final answer
   x = 7,139.14