Finding the Fourth Proportional to 2,128.78, 2,937.72 and 1,244.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.78 : 2,937.72 = 1,244.42 : x
2. Step 2: Convert to fraction form
   2,128.78/2,937.72 = 1,244.42/x
3. Step 3: Cross multiply
   2,128.78x = 2,937.72 × 1,244.42
4. Step 4: Simplify right side
   2,128.78x = 3,655,757.52
5. Step 5: Solve for x
   x = 3,655,757.52/2,128.78
6. Step 6: Final answer
   x = 1,717.30