Finding the Fourth Proportional to 2,617.25, 3,926.89 and 885.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.25 : 3,926.89 = 885.88 : x
2. Step 2: Convert to fraction form
   2,617.25/3,926.89 = 885.88/x
3. Step 3: Cross multiply
   2,617.25x = 3,926.89 × 885.88
4. Step 4: Simplify right side
   2,617.25x = 3,478,753.31
5. Step 5: Solve for x
   x = 3,478,753.31/2,617.25
6. Step 6: Final answer
   x = 1,329.16