Finding the Fourth Proportional to 2,493.31, 3,724.18 and 1,939.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,493.31 : 3,724.18 = 1,939.72 : x
2. Step 2: Convert to fraction form
   2,493.31/3,724.18 = 1,939.72/x
3. Step 3: Cross multiply
   2,493.31x = 3,724.18 × 1,939.72
4. Step 4: Simplify right side
   2,493.31x = 7,223,869.73
5. Step 5: Solve for x
   x = 7,223,869.73/2,493.31
6. Step 6: Final answer
   x = 2,897.31