Finding the Fourth Proportional to 1,196.30, 1,650.81 and 672.20

Step by Step Solution

1. Step 1: Write the proportion equation
   1,196.30 : 1,650.81 = 672.20 : x
2. Step 2: Convert to fraction form
   1,196.30/1,650.81 = 672.20/x
3. Step 3: Cross multiply
   1,196.30x = 1,650.81 × 672.20
4. Step 4: Simplify right side
   1,196.30x = 1,109,674.48
5. Step 5: Solve for x
   x = 1,109,674.48/1,196.30
6. Step 6: Final answer
   x = 927.59