Finding the Fourth Proportional to 2,160.56, 3,223.92 and 1,716.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,160.56 : 3,223.92 = 1,716.80 : x
2. Step 2: Convert to fraction form
   2,160.56/3,223.92 = 1,716.80/x
3. Step 3: Cross multiply
   2,160.56x = 3,223.92 × 1,716.80
4. Step 4: Simplify right side
   2,160.56x = 5,534,825.86
5. Step 5: Solve for x
   x = 5,534,825.86/2,160.56
6. Step 6: Final answer
   x = 2,561.76