Finding the Fourth Proportional to 5,427.09, 7,485.27 and 3,939.93

Step by Step Solution

1. Step 1: Write the proportion equation
   5,427.09 : 7,485.27 = 3,939.93 : x
2. Step 2: Convert to fraction form
   5,427.09/7,485.27 = 3,939.93/x
3. Step 3: Cross multiply
   5,427.09x = 7,485.27 × 3,939.93
4. Step 4: Simplify right side
   5,427.09x = 29,491,439.83
5. Step 5: Solve for x
   x = 29,491,439.83/5,427.09
6. Step 6: Final answer
   x = 5,434.12