Finding the Fourth Proportional to 2,617.08, 3,925.86 and 885.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.08 : 3,925.86 = 885.72 : x
2. Step 2: Convert to fraction form
   2,617.08/3,925.86 = 885.72/x
3. Step 3: Cross multiply
   2,617.08x = 3,925.86 × 885.72
4. Step 4: Simplify right side
   2,617.08x = 3,477,212.72
5. Step 5: Solve for x
   x = 3,477,212.72/2,617.08
6. Step 6: Final answer
   x = 1,328.66