Finding the Fourth Proportional to 2,144.72, 2,959.06 and 1,398.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.72 : 2,959.06 = 1,398.41 : x
2. Step 2: Convert to fraction form
   2,144.72/2,959.06 = 1,398.41/x
3. Step 3: Cross multiply
   2,144.72x = 2,959.06 × 1,398.41
4. Step 4: Simplify right side
   2,144.72x = 4,137,979.09
5. Step 5: Solve for x
   x = 4,137,979.09/2,144.72
6. Step 6: Final answer
   x = 1,929.38