Finding the Fourth Proportional to 404,851.44, 606,870.73 and 138,429.73

Step by Step Solution

1. Step 1: Write the proportion equation
   404,851.44 : 606,870.73 = 138,429.73 : x
2. Step 2: Convert to fraction form
   404,851.44/606,870.73 = 138,429.73/x
3. Step 3: Cross multiply
   404,851.44x = 606,870.73 × 138,429.73
4. Step 4: Simplify right side
   404,851.44x = 84,008,951,298.80
5. Step 5: Solve for x
   x = 84,008,951,298.80/404,851.44
6. Step 6: Final answer
   x = 207,505.63