Finding the Fourth Proportional to 801,418, 1,105,991.40 and 443,722

Step by Step Solution

1. Step 1: Write the proportion equation
   801,418 : 1,105,991.40 = 443,722 : x
2. Step 2: Convert to fraction form
   801,418/1,105,991.40 = 443,722/x
3. Step 3: Cross multiply
   801,418x = 1,105,991.40 × 443,722
4. Step 4: Simplify right side
   801,418x = 490,752,715,990.80
5. Step 5: Solve for x
   x = 490,752,715,990.80/801,418
6. Step 6: Final answer
   x = 612,355.49