Finding the Fourth Proportional to 1,120.68, 1,546.46 and 648.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,120.68 : 1,546.46 = 648.58 : x
2. Step 2: Convert to fraction form
   1,120.68/1,546.46 = 648.58/x
3. Step 3: Cross multiply
   1,120.68x = 1,546.46 × 648.58
4. Step 4: Simplify right side
   1,120.68x = 1,003,001.41
5. Step 5: Solve for x
   x = 1,003,001.41/1,120.68
6. Step 6: Final answer
   x = 894.99