Finding the Fourth Proportional to 2,641.38, 3,961.90 and 997.71

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.38 : 3,961.90 = 997.71 : x
2. Step 2: Convert to fraction form
   2,641.38/3,961.90 = 997.71/x
3. Step 3: Cross multiply
   2,641.38x = 3,961.90 × 997.71
4. Step 4: Simplify right side
   2,641.38x = 3,952,827.25
5. Step 5: Solve for x
   x = 3,952,827.25/2,641.38
6. Step 6: Final answer
   x = 1,496.50