Finding the Fourth Proportional to 2,116.10, 2,920.24 and 1,171.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.10 : 2,920.24 = 1,171.92 : x
2. Step 2: Convert to fraction form
   2,116.10/2,920.24 = 1,171.92/x
3. Step 3: Cross multiply
   2,116.10x = 2,920.24 × 1,171.92
4. Step 4: Simplify right side
   2,116.10x = 3,422,287.66
5. Step 5: Solve for x
   x = 3,422,287.66/2,116.10
6. Step 6: Final answer
   x = 1,617.26