Finding the Fourth Proportional to 1,146.13, 1,581.73 and 648.79

Step by Step Solution

1. Step 1: Write the proportion equation
   1,146.13 : 1,581.73 = 648.79 : x
2. Step 2: Convert to fraction form
   1,146.13/1,581.73 = 648.79/x
3. Step 3: Cross multiply
   1,146.13x = 1,581.73 × 648.79
4. Step 4: Simplify right side
   1,146.13x = 1,026,205.03
5. Step 5: Solve for x
   x = 1,026,205.03/1,146.13
6. Step 6: Final answer
   x = 895.37