Finding the Fourth Proportional to 2,425.86, 3,638.82 and 694.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,425.86 : 3,638.82 = 694.50 : x
2. Step 2: Convert to fraction form
   2,425.86/3,638.82 = 694.50/x
3. Step 3: Cross multiply
   2,425.86x = 3,638.82 × 694.50
4. Step 4: Simplify right side
   2,425.86x = 2,527,160.49
5. Step 5: Solve for x
   x = 2,527,160.49/2,425.86
6. Step 6: Final answer
   x = 1,041.76