Finding the Fourth Proportional to 5,393.31, 7,442.88 and 3,156.81

Step by Step Solution

1. Step 1: Write the proportion equation
   5,393.31 : 7,442.88 = 3,156.81 : x
2. Step 2: Convert to fraction form
   5,393.31/7,442.88 = 3,156.81/x
3. Step 3: Cross multiply
   5,393.31x = 7,442.88 × 3,156.81
4. Step 4: Simplify right side
   5,393.31x = 23,495,758.01
5. Step 5: Solve for x
   x = 23,495,758.01/5,393.31
6. Step 6: Final answer
   x = 4,356.46