Finding the Fourth Proportional to 2,168.51, 2,992.52 and 1,224.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,168.51 : 2,992.52 = 1,224.32 : x
2. Step 2: Convert to fraction form
   2,168.51/2,992.52 = 1,224.32/x
3. Step 3: Cross multiply
   2,168.51x = 2,992.52 × 1,224.32
4. Step 4: Simplify right side
   2,168.51x = 3,663,795.96
5. Step 5: Solve for x
   x = 3,663,795.96/2,168.51
6. Step 6: Final answer
   x = 1,689.55