Finding the Fourth Proportional to 1,721.25, 2,582.42 and 747.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,721.25 : 2,582.42 = 747.50 : x
2. Step 2: Convert to fraction form
   1,721.25/2,582.42 = 747.50/x
3. Step 3: Cross multiply
   1,721.25x = 2,582.42 × 747.50
4. Step 4: Simplify right side
   1,721.25x = 1,930,342.30
5. Step 5: Solve for x
   x = 1,930,342.30/1,721.25
6. Step 6: Final answer
   x = 1,121.48