Finding the Fourth Proportional to 2,168.22, 2,992.17 and 1,223.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,168.22 : 2,992.17 = 1,223.82 : x
2. Step 2: Convert to fraction form
   2,168.22/2,992.17 = 1,223.82/x
3. Step 3: Cross multiply
   2,168.22x = 2,992.17 × 1,223.82
4. Step 4: Simplify right side
   2,168.22x = 3,661,875.96
5. Step 5: Solve for x
   x = 3,661,875.96/2,168.22
6. Step 6: Final answer
   x = 1,688.89