Finding the Fourth Proportional to 2,749.58, 4,121.49 and 1,287.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,749.58 : 4,121.49 = 1,287.50 : x
2. Step 2: Convert to fraction form
   2,749.58/4,121.49 = 1,287.50/x
3. Step 3: Cross multiply
   2,749.58x = 4,121.49 × 1,287.50
4. Step 4: Simplify right side
   2,749.58x = 5,306,418.38
5. Step 5: Solve for x
   x = 5,306,418.38/2,749.58
6. Step 6: Final answer
   x = 1,929.90