Finding the Fourth Proportional to 414,912.10, 620,934.55 and 248,819.30

Step by Step Solution

1. Step 1: Write the proportion equation
   414,912.10 : 620,934.55 = 248,819.30 : x
2. Step 2: Convert to fraction form
   414,912.10/620,934.55 = 248,819.30/x
3. Step 3: Cross multiply
   414,912.10x = 620,934.55 × 248,819.30
4. Step 4: Simplify right side
   414,912.10x = 154,500,500,076.82
5. Step 5: Solve for x
   x = 154,500,500,076.82/414,912.10
6. Step 6: Final answer
   x = 372,369.23