Finding the Fourth Proportional to 8,710.52, 12,022.98 and 7,142.36

Step by Step Solution

1. Step 1: Write the proportion equation
   8,710.52 : 12,022.98 = 7,142.36 : x
2. Step 2: Convert to fraction form
   8,710.52/12,022.98 = 7,142.36/x
3. Step 3: Cross multiply
   8,710.52x = 12,022.98 × 7,142.36
4. Step 4: Simplify right side
   8,710.52x = 85,872,451.43
5. Step 5: Solve for x
   x = 85,872,451.43/8,710.52
6. Step 6: Final answer
   x = 9,858.48