Finding the Fourth Proportional to 2,542.40, 3,813.89 and 898.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,542.40 : 3,813.89 = 898.61 : x
2. Step 2: Convert to fraction form
   2,542.40/3,813.89 = 898.61/x
3. Step 3: Cross multiply
   2,542.40x = 3,813.89 × 898.61
4. Step 4: Simplify right side
   2,542.40x = 3,427,182.87
5. Step 5: Solve for x
   x = 3,427,182.87/2,542.40
6. Step 6: Final answer
   x = 1,348.01