Finding the Fourth Proportional to 2,665.46, 3,998.38 and 816.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.46 : 3,998.38 = 816.68 : x
2. Step 2: Convert to fraction form
   2,665.46/3,998.38 = 816.68/x
3. Step 3: Cross multiply
   2,665.46x = 3,998.38 × 816.68
4. Step 4: Simplify right side
   2,665.46x = 3,265,396.98
5. Step 5: Solve for x
   x = 3,265,396.98/2,665.46
6. Step 6: Final answer
   x = 1,225.08