Finding the Fourth Proportional to 2,168.34, 2,992.02 and 1,223.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,168.34 : 2,992.02 = 1,223.82 : x
2. Step 2: Convert to fraction form
   2,168.34/2,992.02 = 1,223.82/x
3. Step 3: Cross multiply
   2,168.34x = 2,992.02 × 1,223.82
4. Step 4: Simplify right side
   2,168.34x = 3,661,693.92
5. Step 5: Solve for x
   x = 3,661,693.92/2,168.34
6. Step 6: Final answer
   x = 1,688.71