Finding the Fourth Proportional to 1,015.71, 1,524.34 and 668.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,015.71 : 1,524.34 = 668.93 : x
2. Step 2: Convert to fraction form
   1,015.71/1,524.34 = 668.93/x
3. Step 3: Cross multiply
   1,015.71x = 1,524.34 × 668.93
4. Step 4: Simplify right side
   1,015.71x = 1,019,667.46
5. Step 5: Solve for x
   x = 1,019,667.46/1,015.71
6. Step 6: Final answer
   x = 1,003.90