Finding the Fourth Proportional to 2,510.18, 3,765.49 and 661.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,510.18 : 3,765.49 = 661.31 : x
2. Step 2: Convert to fraction form
   2,510.18/3,765.49 = 661.31/x
3. Step 3: Cross multiply
   2,510.18x = 3,765.49 × 661.31
4. Step 4: Simplify right side
   2,510.18x = 2,490,134.06
5. Step 5: Solve for x
   x = 2,490,134.06/2,510.18
6. Step 6: Final answer
   x = 992.01