Finding the Fourth Proportional to 12,865.61, 17,758.02 and 7,562.13

Step by Step Solution

1. Step 1: Write the proportion equation
   12,865.61 : 17,758.02 = 7,562.13 : x
2. Step 2: Convert to fraction form
   12,865.61/17,758.02 = 7,562.13/x
3. Step 3: Cross multiply
   12,865.61x = 17,758.02 × 7,562.13
4. Step 4: Simplify right side
   12,865.61x = 134,288,455.78
5. Step 5: Solve for x
   x = 134,288,455.78/12,865.61
6. Step 6: Final answer
   x = 10,437.79