Finding the Fourth Proportional to 801,418.50, 1,105,992.09 and 443,722.50

Step by Step Solution

1. Step 1: Write the proportion equation
   801,418.50 : 1,105,992.09 = 443,722.50 : x
2. Step 2: Convert to fraction form
   801,418.50/1,105,992.09 = 443,722.50/x
3. Step 3: Cross multiply
   801,418.50x = 1,105,992.09 × 443,722.50
4. Step 4: Simplify right side
   801,418.50x = 490,753,575,155.03
5. Step 5: Solve for x
   x = 490,753,575,155.03/801,418.50
6. Step 6: Final answer
   x = 612,356.18