Finding the Fourth Proportional to 8,862.89, 12,142.10 and 8,530.52

Step by Step Solution

1. Step 1: Write the proportion equation
   8,862.89 : 12,142.10 = 8,530.52 : x
2. Step 2: Convert to fraction form
   8,862.89/12,142.10 = 8,530.52/x
3. Step 3: Cross multiply
   8,862.89x = 12,142.10 × 8,530.52
4. Step 4: Simplify right side
   8,862.89x = 103,578,387.51
5. Step 5: Solve for x
   x = 103,578,387.51/8,862.89
6. Step 6: Final answer
   x = 11,686.76