Finding the Fourth Proportional to 2,616.54, 3,925.17 and 767.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,616.54 : 3,925.17 = 767.38 : x
2. Step 2: Convert to fraction form
   2,616.54/3,925.17 = 767.38/x
3. Step 3: Cross multiply
   2,616.54x = 3,925.17 × 767.38
4. Step 4: Simplify right side
   2,616.54x = 3,012,096.95
5. Step 5: Solve for x
   x = 3,012,096.95/2,616.54
6. Step 6: Final answer
   x = 1,151.18