Finding the Fourth Proportional to 2,139.48, 3,209.28 and 1,044.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,139.48 : 3,209.28 = 1,044.72 : x
2. Step 2: Convert to fraction form
   2,139.48/3,209.28 = 1,044.72/x
3. Step 3: Cross multiply
   2,139.48x = 3,209.28 × 1,044.72
4. Step 4: Simplify right side
   2,139.48x = 3,352,799.00
5. Step 5: Solve for x
   x = 3,352,799.00/2,139.48
6. Step 6: Final answer
   x = 1,567.11