Finding the Fourth Proportional to 2,616.51, 3,925.04 and 767.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,616.51 : 3,925.04 = 767.62 : x
2. Step 2: Convert to fraction form
   2,616.51/3,925.04 = 767.62/x
3. Step 3: Cross multiply
   2,616.51x = 3,925.04 × 767.62
4. Step 4: Simplify right side
   2,616.51x = 3,012,925.55
5. Step 5: Solve for x
   x = 3,012,925.55/2,616.51
6. Step 6: Final answer
   x = 1,151.51