Finding the Fourth Proportional to 5,157.43, 7,111.87 and 3,061.15

Step by Step Solution

1. Step 1: Write the proportion equation
   5,157.43 : 7,111.87 = 3,061.15 : x
2. Step 2: Convert to fraction form
   5,157.43/7,111.87 = 3,061.15/x
3. Step 3: Cross multiply
   5,157.43x = 7,111.87 × 3,061.15
4. Step 4: Simplify right side
   5,157.43x = 21,770,500.85
5. Step 5: Solve for x
   x = 21,770,500.85/5,157.43
6. Step 6: Final answer
   x = 4,221.19