Finding the Fourth Proportional to 439,468.50, 606,449.72 and 248,485.89

Step by Step Solution

1. Step 1: Write the proportion equation
   439,468.50 : 606,449.72 = 248,485.89 : x
2. Step 2: Convert to fraction form
   439,468.50/606,449.72 = 248,485.89/x
3. Step 3: Cross multiply
   439,468.50x = 606,449.72 × 248,485.89
4. Step 4: Simplify right side
   439,468.50x = 150,694,197,172.02
5. Step 5: Solve for x
   x = 150,694,197,172.02/439,468.50
6. Step 6: Final answer
   x = 342,901.02