Finding the Fourth Proportional to 2,149.31, 3,224.43 and 668.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,149.31 : 3,224.43 = 668.50 : x
2. Step 2: Convert to fraction form
   2,149.31/3,224.43 = 668.50/x
3. Step 3: Cross multiply
   2,149.31x = 3,224.43 × 668.50
4. Step 4: Simplify right side
   2,149.31x = 2,155,531.46
5. Step 5: Solve for x
   x = 2,155,531.46/2,149.31
6. Step 6: Final answer
   x = 1,002.89