Finding the Fourth Proportional to 1,196.80, 1,651.76 and 672.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,196.80 : 1,651.76 = 672.96 : x
2. Step 2: Convert to fraction form
   1,196.80/1,651.76 = 672.96/x
3. Step 3: Cross multiply
   1,196.80x = 1,651.76 × 672.96
4. Step 4: Simplify right side
   1,196.80x = 1,111,568.41
5. Step 5: Solve for x
   x = 1,111,568.41/1,196.80
6. Step 6: Final answer
   x = 928.78