Finding the Fourth Proportional to 1,120.35, 1,545.96 and 648.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,120.35 : 1,545.96 = 648.18 : x
2. Step 2: Convert to fraction form
   1,120.35/1,545.96 = 648.18/x
3. Step 3: Cross multiply
   1,120.35x = 1,545.96 × 648.18
4. Step 4: Simplify right side
   1,120.35x = 1,002,060.35
5. Step 5: Solve for x
   x = 1,002,060.35/1,120.35
6. Step 6: Final answer
   x = 894.42