Finding the Fourth Proportional to 300,638.88, 414,956.52 and 173,391.12

Step by Step Solution

1. Step 1: Write the proportion equation
   300,638.88 : 414,956.52 = 173,391.12 : x
2. Step 2: Convert to fraction form
   300,638.88/414,956.52 = 173,391.12/x
3. Step 3: Cross multiply
   300,638.88x = 414,956.52 × 173,391.12
4. Step 4: Simplify right side
   300,638.88x = 71,949,775,754.10
5. Step 5: Solve for x
   x = 71,949,775,754.10/300,638.88
6. Step 6: Final answer
   x = 239,322.92