Finding the Fourth Proportional to 5,153.27, 7,111.31 and 3,138.53

Step by Step Solution

1. Step 1: Write the proportion equation
   5,153.27 : 7,111.31 = 3,138.53 : x
2. Step 2: Convert to fraction form
   5,153.27/7,111.31 = 3,138.53/x
3. Step 3: Cross multiply
   5,153.27x = 7,111.31 × 3,138.53
4. Step 4: Simplify right side
   5,153.27x = 22,319,008.53
5. Step 5: Solve for x
   x = 22,319,008.53/5,153.27
6. Step 6: Final answer
   x = 4,331.04