Finding the Fourth Proportional to 2,665.49, 3,992.42 and 2,198.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.49 : 3,992.42 = 2,198.02 : x
2. Step 2: Convert to fraction form
   2,665.49/3,992.42 = 2,198.02/x
3. Step 3: Cross multiply
   2,665.49x = 3,992.42 × 2,198.02
4. Step 4: Simplify right side
   2,665.49x = 8,775,419.01
5. Step 5: Solve for x
   x = 8,775,419.01/2,665.49
6. Step 6: Final answer
   x = 3,292.23