Finding the Fourth Proportional to 2,665.55, 3,998.09 and 1,204.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.55 : 3,998.09 = 1,204.80 : x
2. Step 2: Convert to fraction form
   2,665.55/3,998.09 = 1,204.80/x
3. Step 3: Cross multiply
   2,665.55x = 3,998.09 × 1,204.80
4. Step 4: Simplify right side
   2,665.55x = 4,816,892.81
5. Step 5: Solve for x
   x = 4,816,892.81/2,665.55
6. Step 6: Final answer
   x = 1,807.09