Finding the Fourth Proportional to 1,120.38, 1,546.20 and 648.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,120.38 : 1,546.20 = 648.37 : x
2. Step 2: Convert to fraction form
   1,120.38/1,546.20 = 648.37/x
3. Step 3: Cross multiply
   1,120.38x = 1,546.20 × 648.37
4. Step 4: Simplify right side
   1,120.38x = 1,002,509.69
5. Step 5: Solve for x
   x = 1,002,509.69/1,120.38
6. Step 6: Final answer
   x = 894.79