Finding the Fourth Proportional to 1,196.10, 1,650.60 and 672.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,196.10 : 1,650.60 = 672.18 : x
2. Step 2: Convert to fraction form
   1,196.10/1,650.60 = 672.18/x
3. Step 3: Cross multiply
   1,196.10x = 1,650.60 × 672.18
4. Step 4: Simplify right side
   1,196.10x = 1,109,500.31
5. Step 5: Solve for x
   x = 1,109,500.31/1,196.10
6. Step 6: Final answer
   x = 927.60