Finding the Fourth Proportional to 2,641.48, 3,961.86 and 693.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.48 : 3,961.86 = 693.56 : x
2. Step 2: Convert to fraction form
   2,641.48/3,961.86 = 693.56/x
3. Step 3: Cross multiply
   2,641.48x = 3,961.86 × 693.56
4. Step 4: Simplify right side
   2,641.48x = 2,747,787.62
5. Step 5: Solve for x
   x = 2,747,787.62/2,641.48
6. Step 6: Final answer
   x = 1,040.25