Finding the Fourth Proportional to 5,139.30, 7,092.24 and 2,781.42

Step by Step Solution

1. Step 1: Write the proportion equation
   5,139.30 : 7,092.24 = 2,781.42 : x
2. Step 2: Convert to fraction form
   5,139.30/7,092.24 = 2,781.42/x
3. Step 3: Cross multiply
   5,139.30x = 7,092.24 × 2,781.42
4. Step 4: Simplify right side
   5,139.30x = 19,726,498.18
5. Step 5: Solve for x
   x = 19,726,498.18/5,139.30
6. Step 6: Final answer
   x = 3,838.36