Finding the Fourth Proportional to 2,617.08, 3,925.72 and 768.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.08 : 3,925.72 = 768.20 : x
2. Step 2: Convert to fraction form
   2,617.08/3,925.72 = 768.20/x
3. Step 3: Cross multiply
   2,617.08x = 3,925.72 × 768.20
4. Step 4: Simplify right side
   2,617.08x = 3,015,738.10
5. Step 5: Solve for x
   x = 3,015,738.10/2,617.08
6. Step 6: Final answer
   x = 1,152.33