Finding the Fourth Proportional to 8,757.78, 12,085.92 and 5,402.22

Step by Step Solution

1. Step 1: Write the proportion equation
   8,757.78 : 12,085.92 = 5,402.22 : x
2. Step 2: Convert to fraction form
   8,757.78/12,085.92 = 5,402.22/x
3. Step 3: Cross multiply
   8,757.78x = 12,085.92 × 5,402.22
4. Step 4: Simplify right side
   8,757.78x = 65,290,798.74
5. Step 5: Solve for x
   x = 65,290,798.74/8,757.78
6. Step 6: Final answer
   x = 7,455.18