Finding the Fourth Proportional to 1,170.24, 1,614.84 and 672.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,170.24 : 1,614.84 = 672.89 : x
2. Step 2: Convert to fraction form
   1,170.24/1,614.84 = 672.89/x
3. Step 3: Cross multiply
   1,170.24x = 1,614.84 × 672.89
4. Step 4: Simplify right side
   1,170.24x = 1,086,601.61
5. Step 5: Solve for x
   x = 1,086,601.61/1,170.24
6. Step 6: Final answer
   x = 928.53