Finding the Fourth Proportional to 1,120.79, 1,546.57 and 648.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,120.79 : 1,546.57 = 648.62 : x
2. Step 2: Convert to fraction form
   1,120.79/1,546.57 = 648.62/x
3. Step 3: Cross multiply
   1,120.79x = 1,546.57 × 648.62
4. Step 4: Simplify right side
   1,120.79x = 1,003,126.88
5. Step 5: Solve for x
   x = 1,003,126.88/1,120.79
6. Step 6: Final answer
   x = 895.02