Finding the Fourth Proportional to 1,120.74, 1,546.52 and 648.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,120.74 : 1,546.52 = 648.68 : x
2. Step 2: Convert to fraction form
   1,120.74/1,546.52 = 648.68/x
3. Step 3: Cross multiply
   1,120.74x = 1,546.52 × 648.68
4. Step 4: Simplify right side
   1,120.74x = 1,003,196.59
5. Step 5: Solve for x
   x = 1,003,196.59/1,120.74
6. Step 6: Final answer
   x = 895.12