Finding the Fourth Proportional to 2,612.48, 3,918.69 and 664.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,612.48 : 3,918.69 = 664.67 : x
2. Step 2: Convert to fraction form
   2,612.48/3,918.69 = 664.67/x
3. Step 3: Cross multiply
   2,612.48x = 3,918.69 × 664.67
4. Step 4: Simplify right side
   2,612.48x = 2,604,645.48
5. Step 5: Solve for x
   x = 2,604,645.48/2,612.48
6. Step 6: Final answer
   x = 997.00