Finding the Fourth Proportional to 443,626.23, 665,784.42 and 309,636.03

Step by Step Solution

1. Step 1: Write the proportion equation
   443,626.23 : 665,784.42 = 309,636.03 : x
2. Step 2: Convert to fraction form
   443,626.23/665,784.42 = 309,636.03/x
3. Step 3: Cross multiply
   443,626.23x = 665,784.42 × 309,636.03
4. Step 4: Simplify right side
   443,626.23x = 206,150,844,644.65
5. Step 5: Solve for x
   x = 206,150,844,644.65/443,626.23
6. Step 6: Final answer
   x = 464,694.90