Finding the Fourth Proportional to 1,145.97, 1,581.51 and 648.43

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.97 : 1,581.51 = 648.43 : x
2. Step 2: Convert to fraction form
   1,145.97/1,581.51 = 648.43/x
3. Step 3: Cross multiply
   1,145.97x = 1,581.51 × 648.43
4. Step 4: Simplify right side
   1,145.97x = 1,025,498.53
5. Step 5: Solve for x
   x = 1,025,498.53/1,145.97
6. Step 6: Final answer
   x = 894.87