Finding the Fourth Proportional to 800,786.86, 1,105,085.96 and 438,210.79

Step by Step Solution

1. Step 1: Write the proportion equation
   800,786.86 : 1,105,085.96 = 438,210.79 : x
2. Step 2: Convert to fraction form
   800,786.86/1,105,085.96 = 438,210.79/x
3. Step 3: Cross multiply
   800,786.86x = 1,105,085.96 × 438,210.79
4. Step 4: Simplify right side
   800,786.86x = 484,260,591,549.51
5. Step 5: Solve for x
   x = 484,260,591,549.51/800,786.86
6. Step 6: Final answer
   x = 604,730.94