Finding the Fourth Proportional to 2,641.88, 3,960.66 and 997.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.88 : 3,960.66 = 997.50 : x
2. Step 2: Convert to fraction form
   2,641.88/3,960.66 = 997.50/x
3. Step 3: Cross multiply
   2,641.88x = 3,960.66 × 997.50
4. Step 4: Simplify right side
   2,641.88x = 3,950,758.35
5. Step 5: Solve for x
   x = 3,950,758.35/2,641.88
6. Step 6: Final answer
   x = 1,495.43