Finding the Fourth Proportional to 439,443.72, 606,448.64 and 248,445.72

Step by Step Solution

1. Step 1: Write the proportion equation
   439,443.72 : 606,448.64 = 248,445.72 : x
2. Step 2: Convert to fraction form
   439,443.72/606,448.64 = 248,445.72/x
3. Step 3: Cross multiply
   439,443.72x = 606,448.64 × 248,445.72
4. Step 4: Simplify right side
   439,443.72x = 150,669,569,007.82
5. Step 5: Solve for x
   x = 150,669,569,007.82/439,443.72
6. Step 6: Final answer
   x = 342,864.31