Finding the Fourth Proportional to 443,442.78, 611,951.05 and 242,238.78

Step by Step Solution

1. Step 1: Write the proportion equation
   443,442.78 : 611,951.05 = 242,238.78 : x
2. Step 2: Convert to fraction form
   443,442.78/611,951.05 = 242,238.78/x
3. Step 3: Cross multiply
   443,442.78x = 611,951.05 × 242,238.78
4. Step 4: Simplify right side
   443,442.78x = 148,238,275,771.72
5. Step 5: Solve for x
   x = 148,238,275,771.72/443,442.78
6. Step 6: Final answer
   x = 334,289.52