Finding the Fourth Proportional to 2,405.98, 3,609.15 and 762.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,405.98 : 3,609.15 = 762.61 : x
2. Step 2: Convert to fraction form
   2,405.98/3,609.15 = 762.61/x
3. Step 3: Cross multiply
   2,405.98x = 3,609.15 × 762.61
4. Step 4: Simplify right side
   2,405.98x = 2,752,373.88
5. Step 5: Solve for x
   x = 2,752,373.88/2,405.98
6. Step 6: Final answer
   x = 1,143.97