Finding the Fourth Proportional to 2,144.76, 3,217.25 and 665.01

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.76 : 3,217.25 = 665.01 : x
2. Step 2: Convert to fraction form
   2,144.76/3,217.25 = 665.01/x
3. Step 3: Cross multiply
   2,144.76x = 3,217.25 × 665.01
4. Step 4: Simplify right side
   2,144.76x = 2,139,501.34
5. Step 5: Solve for x
   x = 2,139,501.34/2,144.76
6. Step 6: Final answer
   x = 997.55