Finding the Fourth Proportional to 404,111.57, 606,229.65 and 137,809.80

Step by Step Solution

1. Step 1: Write the proportion equation
   404,111.57 : 606,229.65 = 137,809.80 : x
2. Step 2: Convert to fraction form
   404,111.57/606,229.65 = 137,809.80/x
3. Step 3: Cross multiply
   404,111.57x = 606,229.65 × 137,809.80
4. Step 4: Simplify right side
   404,111.57x = 83,544,386,820.57
5. Step 5: Solve for x
   x = 83,544,386,820.57/404,111.57
6. Step 6: Final answer
   x = 206,735.94