Finding the Fourth Proportional to 2,408.18, 3,612.56 and 764.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,408.18 : 3,612.56 = 764.15 : x
2. Step 2: Convert to fraction form
   2,408.18/3,612.56 = 764.15/x
3. Step 3: Cross multiply
   2,408.18x = 3,612.56 × 764.15
4. Step 4: Simplify right side
   2,408.18x = 2,760,515.84
5. Step 5: Solve for x
   x = 2,760,515.84/2,408.18
6. Step 6: Final answer
   x = 1,146.31