Finding the Fourth Proportional to 2,153.38, 2,972.02 and 1,222.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,153.38 : 2,972.02 = 1,222.42 : x
2. Step 2: Convert to fraction form
   2,153.38/2,972.02 = 1,222.42/x
3. Step 3: Cross multiply
   2,153.38x = 2,972.02 × 1,222.42
4. Step 4: Simplify right side
   2,153.38x = 3,633,056.69
5. Step 5: Solve for x
   x = 3,633,056.69/2,153.38
6. Step 6: Final answer
   x = 1,687.14