Finding the Fourth Proportional to 5,139.43, 7,092.41 and 2,781.56

Step by Step Solution

1. Step 1: Write the proportion equation
   5,139.43 : 7,092.41 = 2,781.56 : x
2. Step 2: Convert to fraction form
   5,139.43/7,092.41 = 2,781.56/x
3. Step 3: Cross multiply
   5,139.43x = 7,092.41 × 2,781.56
4. Step 4: Simplify right side
   5,139.43x = 19,727,967.78
5. Step 5: Solve for x
   x = 19,727,967.78/5,139.43
6. Step 6: Final answer
   x = 3,838.55