Finding the Fourth Proportional to 2,665.94, 3,998.99 and 817.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.94 : 3,998.99 = 817.02 : x
2. Step 2: Convert to fraction form
   2,665.94/3,998.99 = 817.02/x
3. Step 3: Cross multiply
   2,665.94x = 3,998.99 × 817.02
4. Step 4: Simplify right side
   2,665.94x = 3,267,250.72
5. Step 5: Solve for x
   x = 3,267,250.72/2,665.94
6. Step 6: Final answer
   x = 1,225.56