Finding the Fourth Proportional to 1,095.35, 1,644.78 and 725.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,095.35 : 1,644.78 = 725.72 : x
2. Step 2: Convert to fraction form
   1,095.35/1,644.78 = 725.72/x
3. Step 3: Cross multiply
   1,095.35x = 1,644.78 × 725.72
4. Step 4: Simplify right side
   1,095.35x = 1,193,641.52
5. Step 5: Solve for x
   x = 1,193,641.52/1,095.35
6. Step 6: Final answer
   x = 1,089.74