Finding the Fourth Proportional to 5,357.06, 8,025.86 and 5,240.42

Step by Step Solution

1. Step 1: Write the proportion equation
   5,357.06 : 8,025.86 = 5,240.42 : x
2. Step 2: Convert to fraction form
   5,357.06/8,025.86 = 5,240.42/x
3. Step 3: Cross multiply
   5,357.06x = 8,025.86 × 5,240.42
4. Step 4: Simplify right side
   5,357.06x = 42,058,877.26
5. Step 5: Solve for x
   x = 42,058,877.26/5,357.06
6. Step 6: Final answer
   x = 7,851.11