Finding the Fourth Proportional to 2,641.32, 3,961.86 and 997.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.32 : 3,961.86 = 997.74 : x
2. Step 2: Convert to fraction form
   2,641.32/3,961.86 = 997.74/x
3. Step 3: Cross multiply
   2,641.32x = 3,961.86 × 997.74
4. Step 4: Simplify right side
   2,641.32x = 3,952,906.20
5. Step 5: Solve for x
   x = 3,952,906.20/2,641.32
6. Step 6: Final answer
   x = 1,496.56