Finding the Fourth Proportional to 5,401.88, 8,054.71 and 5,391.55

Step by Step Solution

1. Step 1: Write the proportion equation
   5,401.88 : 8,054.71 = 5,391.55 : x
2. Step 2: Convert to fraction form
   5,401.88/8,054.71 = 5,391.55/x
3. Step 3: Cross multiply
   5,401.88x = 8,054.71 × 5,391.55
4. Step 4: Simplify right side
   5,401.88x = 43,427,371.70
5. Step 5: Solve for x
   x = 43,427,371.70/5,401.88
6. Step 6: Final answer
   x = 8,039.31