Finding the Fourth Proportional to 2,154.52, 2,972.46 and 1,222.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,154.52 : 2,972.46 = 1,222.48 : x
2. Step 2: Convert to fraction form
   2,154.52/2,972.46 = 1,222.48/x
3. Step 3: Cross multiply
   2,154.52x = 2,972.46 × 1,222.48
4. Step 4: Simplify right side
   2,154.52x = 3,633,772.90
5. Step 5: Solve for x
   x = 3,633,772.90/2,154.52
6. Step 6: Final answer
   x = 1,686.58