Finding the Fourth Proportional to 1,168.20, 1,753.38 and 648.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,168.20 : 1,753.38 = 648.72 : x
2. Step 2: Convert to fraction form
   1,168.20/1,753.38 = 648.72/x
3. Step 3: Cross multiply
   1,168.20x = 1,753.38 × 648.72
4. Step 4: Simplify right side
   1,168.20x = 1,137,452.67
5. Step 5: Solve for x
   x = 1,137,452.67/1,168.20
6. Step 6: Final answer
   x = 973.68