Finding the Fourth Proportional to 2,616.81, 3,925.89 and 1,520.23

Step by Step Solution

1. Step 1: Write the proportion equation
   2,616.81 : 3,925.89 = 1,520.23 : x
2. Step 2: Convert to fraction form
   2,616.81/3,925.89 = 1,520.23/x
3. Step 3: Cross multiply
   2,616.81x = 3,925.89 × 1,520.23
4. Step 4: Simplify right side
   2,616.81x = 5,968,255.75
5. Step 5: Solve for x
   x = 5,968,255.75/2,616.81
6. Step 6: Final answer
   x = 2,280.74