Finding the Fourth Proportional to 408,478.39, 611,667.82 and 250,227.07

Step by Step Solution

1. Step 1: Write the proportion equation
   408,478.39 : 611,667.82 = 250,227.07 : x
2. Step 2: Convert to fraction form
   408,478.39/611,667.82 = 250,227.07/x
3. Step 3: Cross multiply
   408,478.39x = 611,667.82 × 250,227.07
4. Step 4: Simplify right side
   408,478.39x = 153,055,846,411.89
5. Step 5: Solve for x
   x = 153,055,846,411.89/408,478.39
6. Step 6: Final answer
   x = 374,697.54