Finding the Fourth Proportional to 8,778.10, 12,111.33 and 5,240.02

Step by Step Solution

1. Step 1: Write the proportion equation
   8,778.10 : 12,111.33 = 5,240.02 : x
2. Step 2: Convert to fraction form
   8,778.10/12,111.33 = 5,240.02/x
3. Step 3: Cross multiply
   8,778.10x = 12,111.33 × 5,240.02
4. Step 4: Simplify right side
   8,778.10x = 63,463,600.80
5. Step 5: Solve for x
   x = 63,463,600.80/8,778.10
6. Step 6: Final answer
   x = 7,229.77