Finding the Fourth Proportional to 443,938.07, 612,665.81 and 250,363.10

Step by Step Solution

1. Step 1: Write the proportion equation
   443,938.07 : 612,665.81 = 250,363.10 : x
2. Step 2: Convert to fraction form
   443,938.07/612,665.81 = 250,363.10/x
3. Step 3: Cross multiply
   443,938.07x = 612,665.81 × 250,363.10
4. Step 4: Simplify right side
   443,938.07x = 153,388,907,140.47
5. Step 5: Solve for x
   x = 153,388,907,140.47/443,938.07
6. Step 6: Final answer
   x = 345,518.71