Finding the Fourth Proportional to 1,721.94, 2,581.34 and 747.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,721.94 : 2,581.34 = 747.69 : x
2. Step 2: Convert to fraction form
   1,721.94/2,581.34 = 747.69/x
3. Step 3: Cross multiply
   1,721.94x = 2,581.34 × 747.69
4. Step 4: Simplify right side
   1,721.94x = 1,930,038.37
5. Step 5: Solve for x
   x = 1,930,038.37/1,721.94
6. Step 6: Final answer
   x = 1,120.85