Finding the Fourth Proportional to 1,120.67, 1,546.42 and 648.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,120.67 : 1,546.42 = 648.49 : x
2. Step 2: Convert to fraction form
   1,120.67/1,546.42 = 648.49/x
3. Step 3: Cross multiply
   1,120.67x = 1,546.42 × 648.49
4. Step 4: Simplify right side
   1,120.67x = 1,002,837.91
5. Step 5: Solve for x
   x = 1,002,837.91/1,120.67
6. Step 6: Final answer
   x = 894.86