Finding the Fourth Proportional to 1,014.68, 1,520.22 and 668.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,014.68 : 1,520.22 = 668.72 : x
2. Step 2: Convert to fraction form
   1,014.68/1,520.22 = 668.72/x
3. Step 3: Cross multiply
   1,014.68x = 1,520.22 × 668.72
4. Step 4: Simplify right side
   1,014.68x = 1,016,601.52
5. Step 5: Solve for x
   x = 1,016,601.52/1,014.68
6. Step 6: Final answer
   x = 1,001.89