Finding the Fourth Proportional to 2,426.31, 3,639.78 and 694.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,426.31 : 3,639.78 = 694.98 : x
2. Step 2: Convert to fraction form
   2,426.31/3,639.78 = 694.98/x
3. Step 3: Cross multiply
   2,426.31x = 3,639.78 × 694.98
4. Step 4: Simplify right side
   2,426.31x = 2,529,574.30
5. Step 5: Solve for x
   x = 2,529,574.30/2,426.31
6. Step 6: Final answer
   x = 1,042.56