Finding the Fourth Proportional to 2,510.62, 3,766.11 and 661.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,510.62 : 3,766.11 = 661.72 : x
2. Step 2: Convert to fraction form
   2,510.62/3,766.11 = 661.72/x
3. Step 3: Cross multiply
   2,510.62x = 3,766.11 × 661.72
4. Step 4: Simplify right side
   2,510.62x = 2,492,110.31
5. Step 5: Solve for x
   x = 2,492,110.31/2,510.62
6. Step 6: Final answer
   x = 992.63