Finding the Fourth Proportional to 2,398.80, 3,301.92 and 1,809.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,398.80 : 3,301.92 = 1,809.12 : x
2. Step 2: Convert to fraction form
   2,398.80/3,301.92 = 1,809.12/x
3. Step 3: Cross multiply
   2,398.80x = 3,301.92 × 1,809.12
4. Step 4: Simplify right side
   2,398.80x = 5,973,569.51
5. Step 5: Solve for x
   x = 5,973,569.51/2,398.80
6. Step 6: Final answer
   x = 2,490.23