Finding the Fourth Proportional to 2,168.62, 2,992.71 and 1,224.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,168.62 : 2,992.71 = 1,224.45 : x
2. Step 2: Convert to fraction form
   2,168.62/2,992.71 = 1,224.45/x
3. Step 3: Cross multiply
   2,168.62x = 2,992.71 × 1,224.45
4. Step 4: Simplify right side
   2,168.62x = 3,664,417.64
5. Step 5: Solve for x
   x = 3,664,417.64/2,168.62
6. Step 6: Final answer
   x = 1,689.75