Finding the Fourth Proportional to 8,758.12, 13,124.16 and 8,540.76

Step by Step Solution

1. Step 1: Write the proportion equation
   8,758.12 : 13,124.16 = 8,540.76 : x
2. Step 2: Convert to fraction form
   8,758.12/13,124.16 = 8,540.76/x
3. Step 3: Cross multiply
   8,758.12x = 13,124.16 × 8,540.76
4. Step 4: Simplify right side
   8,758.12x = 112,090,300.76
5. Step 5: Solve for x
   x = 112,090,300.76/8,758.12
6. Step 6: Final answer
   x = 12,798.44