Finding the Fourth Proportional to 5,111.43, 7,672.61 and 4,149.15

Step by Step Solution

1. Step 1: Write the proportion equation
   5,111.43 : 7,672.61 = 4,149.15 : x
2. Step 2: Convert to fraction form
   5,111.43/7,672.61 = 4,149.15/x
3. Step 3: Cross multiply
   5,111.43x = 7,672.61 × 4,149.15
4. Step 4: Simplify right side
   5,111.43x = 31,834,791.38
5. Step 5: Solve for x
   x = 31,834,791.38/5,111.43
6. Step 6: Final answer
   x = 6,228.16