Finding the Fourth Proportional to 1,146.20, 1,581.98 and 648.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,146.20 : 1,581.98 = 648.84 : x
2. Step 2: Convert to fraction form
   1,146.20/1,581.98 = 648.84/x
3. Step 3: Cross multiply
   1,146.20x = 1,581.98 × 648.84
4. Step 4: Simplify right side
   1,146.20x = 1,026,451.90
5. Step 5: Solve for x
   x = 1,026,451.90/1,146.20
6. Step 6: Final answer
   x = 895.53