Finding the Fourth Proportional to 1,764.89, 2,648.59 and 725.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,764.89 : 2,648.59 = 725.84 : x
2. Step 2: Convert to fraction form
   1,764.89/2,648.59 = 725.84/x
3. Step 3: Cross multiply
   1,764.89x = 2,648.59 × 725.84
4. Step 4: Simplify right side
   1,764.89x = 1,922,452.57
5. Step 5: Solve for x
   x = 1,922,452.57/1,764.89
6. Step 6: Final answer
   x = 1,089.28