Finding the Fourth Proportional to 5,402.88, 8,056.20 and 5,392.55

Step by Step Solution

1. Step 1: Write the proportion equation
   5,402.88 : 8,056.20 = 5,392.55 : x
2. Step 2: Convert to fraction form
   5,402.88/8,056.20 = 5,392.55/x
3. Step 3: Cross multiply
   5,402.88x = 8,056.20 × 5,392.55
4. Step 4: Simplify right side
   5,402.88x = 43,443,461.31
5. Step 5: Solve for x
   x = 43,443,461.31/5,402.88
6. Step 6: Final answer
   x = 8,040.80