Finding the Fourth Proportional to 800,885.45, 1,105,222.35 and 438,309.10

Step by Step Solution

1. Step 1: Write the proportion equation
   800,885.45 : 1,105,222.35 = 438,309.10 : x
2. Step 2: Convert to fraction form
   800,885.45/1,105,222.35 = 438,309.10/x
3. Step 3: Cross multiply
   800,885.45x = 1,105,222.35 × 438,309.10
4. Step 4: Simplify right side
   800,885.45x = 484,429,008,002.27
5. Step 5: Solve for x
   x = 484,429,008,002.27/800,885.45
6. Step 6: Final answer
   x = 604,866.79