Finding the Fourth Proportional to 1,879.38, 2,820.72 and 725.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,879.38 : 2,820.72 = 725.94 : x
2. Step 2: Convert to fraction form
   1,879.38/2,820.72 = 725.94/x
3. Step 3: Cross multiply
   1,879.38x = 2,820.72 × 725.94
4. Step 4: Simplify right side
   1,879.38x = 2,047,673.48
5. Step 5: Solve for x
   x = 2,047,673.48/1,879.38
6. Step 6: Final answer
   x = 1,089.55