Finding the Fourth Proportional to 1,120.56, 1,546.40 and 648.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,120.56 : 1,546.40 = 648.48 : x
2. Step 2: Convert to fraction form
   1,120.56/1,546.40 = 648.48/x
3. Step 3: Cross multiply
   1,120.56x = 1,546.40 × 648.48
4. Step 4: Simplify right side
   1,120.56x = 1,002,809.47
5. Step 5: Solve for x
   x = 1,002,809.47/1,120.56
6. Step 6: Final answer
   x = 894.92