Finding the Fourth Proportional to 463,662.34, 639,869.88 and 259,721.98

Step by Step Solution

1. Step 1: Write the proportion equation
   463,662.34 : 639,869.88 = 259,721.98 : x
2. Step 2: Convert to fraction form
   463,662.34/639,869.88 = 259,721.98/x
3. Step 3: Cross multiply
   463,662.34x = 639,869.88 × 259,721.98
4. Step 4: Simplify right side
   463,662.34x = 166,188,272,175.96
5. Step 5: Solve for x
   x = 166,188,272,175.96/463,662.34
6. Step 6: Final answer
   x = 358,425.21