Finding the Fourth Proportional to 463,767.30, 639,997.46 and 257,048.89

Step by Step Solution

1. Step 1: Write the proportion equation
   463,767.30 : 639,997.46 = 257,048.89 : x
2. Step 2: Convert to fraction form
   463,767.30/639,997.46 = 257,048.89/x
3. Step 3: Cross multiply
   463,767.30x = 639,997.46 × 257,048.89
4. Step 4: Simplify right side
   463,767.30x = 164,510,636,695.82
5. Step 5: Solve for x
   x = 164,510,636,695.82/463,767.30
6. Step 6: Final answer
   x = 354,726.68