Finding the Fourth Proportional to 2,542.31, 3,813.43 and 693.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,542.31 : 3,813.43 = 693.61 : x
2. Step 2: Convert to fraction form
   2,542.31/3,813.43 = 693.61/x
3. Step 3: Cross multiply
   2,542.31x = 3,813.43 × 693.61
4. Step 4: Simplify right side
   2,542.31x = 2,645,044.67
5. Step 5: Solve for x
   x = 2,645,044.67/2,542.31
6. Step 6: Final answer
   x = 1,040.41