Finding the Fourth Proportional to 1,196.77, 1,651.55 and 672.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,196.77 : 1,651.55 = 672.80 : x
2. Step 2: Convert to fraction form
   1,196.77/1,651.55 = 672.80/x
3. Step 3: Cross multiply
   1,196.77x = 1,651.55 × 672.80
4. Step 4: Simplify right side
   1,196.77x = 1,111,162.84
5. Step 5: Solve for x
   x = 1,111,162.84/1,196.77
6. Step 6: Final answer
   x = 928.47