Finding the Fourth Proportional to 2,407.98, 3,612.36 and 764.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,407.98 : 3,612.36 = 764.15 : x
2. Step 2: Convert to fraction form
   2,407.98/3,612.36 = 764.15/x
3. Step 3: Cross multiply
   2,407.98x = 3,612.36 × 764.15
4. Step 4: Simplify right side
   2,407.98x = 2,760,390.02
5. Step 5: Solve for x
   x = 2,760,390.02/2,407.98
6. Step 6: Final answer
   x = 1,146.35