Finding the Fourth Proportional to 1,196.64, 1,651.28 and 672.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,196.64 : 1,651.28 = 672.56 : x
2. Step 2: Convert to fraction form
   1,196.64/1,651.28 = 672.56/x
3. Step 3: Cross multiply
   1,196.64x = 1,651.28 × 672.56
4. Step 4: Simplify right side
   1,196.64x = 1,110,584.88
5. Step 5: Solve for x
   x = 1,110,584.88/1,196.64
6. Step 6: Final answer
   x = 928.09