Finding the Fourth Proportional to 2,617.69, 3,927.24 and 886.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,617.69 : 3,927.24 = 886.31 : x
2. Step 2: Convert to fraction form
   2,617.69/3,927.24 = 886.31/x
3. Step 3: Cross multiply
   2,617.69x = 3,927.24 × 886.31
4. Step 4: Simplify right side
   2,617.69x = 3,480,761.90
5. Step 5: Solve for x
   x = 3,480,761.90/2,617.69
6. Step 6: Final answer
   x = 1,329.71