Finding the Fourth Proportional to 1,574.88, 2,173.38 and 911.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,574.88 : 2,173.38 = 911.94 : x
2. Step 2: Convert to fraction form
   1,574.88/2,173.38 = 911.94/x
3. Step 3: Cross multiply
   1,574.88x = 2,173.38 × 911.94
4. Step 4: Simplify right side
   1,574.88x = 1,981,992.16
5. Step 5: Solve for x
   x = 1,981,992.16/1,574.88
6. Step 6: Final answer
   x = 1,258.50