Finding the Fourth Proportional to 5,393.71, 7,443.35 and 3,155.15

Step by Step Solution

1. Step 1: Write the proportion equation
   5,393.71 : 7,443.35 = 3,155.15 : x
2. Step 2: Convert to fraction form
   5,393.71/7,443.35 = 3,155.15/x
3. Step 3: Cross multiply
   5,393.71x = 7,443.35 × 3,155.15
4. Step 4: Simplify right side
   5,393.71x = 23,484,900.42
5. Step 5: Solve for x
   x = 23,484,900.42/5,393.71
6. Step 6: Final answer
   x = 4,354.13