Finding the Fourth Proportional to 2,616.50, 3,925.76 and 885.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,616.50 : 3,925.76 = 885.12 : x
2. Step 2: Convert to fraction form
   2,616.50/3,925.76 = 885.12/x
3. Step 3: Cross multiply
   2,616.50x = 3,925.76 × 885.12
4. Step 4: Simplify right side
   2,616.50x = 3,474,768.69
5. Step 5: Solve for x
   x = 3,474,768.69/2,616.50
6. Step 6: Final answer
   x = 1,328.02