Finding the Fourth Proportional to 800,861.94, 1,105,156.17 and 438,276.78

Step by Step Solution

1. Step 1: Write the proportion equation
   800,861.94 : 1,105,156.17 = 438,276.78 : x
2. Step 2: Convert to fraction form
   800,861.94/1,105,156.17 = 438,276.78/x
3. Step 3: Cross multiply
   800,861.94x = 1,105,156.17 × 438,276.78
4. Step 4: Simplify right side
   800,861.94x = 484,364,287,584.73
5. Step 5: Solve for x
   x = 484,364,287,584.73/800,861.94
6. Step 6: Final answer
   x = 604,803.73