Finding the Fourth Proportional to 463,423.50, 639,468.27 and 259,458.42

Step by Step Solution

1. Step 1: Write the proportion equation
   463,423.50 : 639,468.27 = 259,458.42 : x
2. Step 2: Convert to fraction form
   463,423.50/639,468.27 = 259,458.42/x
3. Step 3: Cross multiply
   463,423.50x = 639,468.27 × 259,458.42
4. Step 4: Simplify right side
   463,423.50x = 165,915,426,974.33
5. Step 5: Solve for x
   x = 165,915,426,974.33/463,423.50
6. Step 6: Final answer
   x = 358,021.18