Finding the Fourth Proportional to 2,406.80, 3,610.29 and 763.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,406.80 : 3,610.29 = 763.31 : x
2. Step 2: Convert to fraction form
   2,406.80/3,610.29 = 763.31/x
3. Step 3: Cross multiply
   2,406.80x = 3,610.29 × 763.31
4. Step 4: Simplify right side
   2,406.80x = 2,755,770.46
5. Step 5: Solve for x
   x = 2,755,770.46/2,406.80
6. Step 6: Final answer
   x = 1,144.99