Finding the Fourth Proportional to 1,120.86, 1,546.81 and 648.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,120.86 : 1,546.81 = 648.77 : x
2. Step 2: Convert to fraction form
   1,120.86/1,546.81 = 648.77/x
3. Step 3: Cross multiply
   1,120.86x = 1,546.81 × 648.77
4. Step 4: Simplify right side
   1,120.86x = 1,003,523.92
5. Step 5: Solve for x
   x = 1,003,523.92/1,120.86
6. Step 6: Final answer
   x = 895.32