Finding the Fourth Proportional to 1,196.76, 1,651.68 and 672.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,196.76 : 1,651.68 = 672.78 : x
2. Step 2: Convert to fraction form
   1,196.76/1,651.68 = 672.78/x
3. Step 3: Cross multiply
   1,196.76x = 1,651.68 × 672.78
4. Step 4: Simplify right side
   1,196.76x = 1,111,217.27
5. Step 5: Solve for x
   x = 1,111,217.27/1,196.76
6. Step 6: Final answer
   x = 928.52