Finding the Fourth Proportional to 9,040.72, 12,485.32 and 8,062.80

Step by Step Solution

1. Step 1: Write the proportion equation
   9,040.72 : 12,485.32 = 8,062.80 : x
2. Step 2: Convert to fraction form
   9,040.72/12,485.32 = 8,062.80/x
3. Step 3: Cross multiply
   9,040.72x = 12,485.32 × 8,062.80
4. Step 4: Simplify right side
   9,040.72x = 100,666,638.10
5. Step 5: Solve for x
   x = 100,666,638.10/9,040.72
6. Step 6: Final answer
   x = 11,134.80