Finding the Fourth Proportional to 408,089.28, 612,036.72 and 171,436.56

Step by Step Solution

1. Step 1: Write the proportion equation
   408,089.28 : 612,036.72 = 171,436.56 : x
2. Step 2: Convert to fraction form
   408,089.28/612,036.72 = 171,436.56/x
3. Step 3: Cross multiply
   408,089.28x = 612,036.72 × 171,436.56
4. Step 4: Simplify right side
   408,089.28x = 104,925,469,870.48
5. Step 5: Solve for x
   x = 104,925,469,870.48/408,089.28
6. Step 6: Final answer
   x = 257,114.01