Finding the Fourth Proportional to 800,787.32, 1,105,086.61 and 438,211.21

Step by Step Solution

1. Step 1: Write the proportion equation
   800,787.32 : 1,105,086.61 = 438,211.21 : x
2. Step 2: Convert to fraction form
   800,787.32/1,105,086.61 = 438,211.21/x
3. Step 3: Cross multiply
   800,787.32x = 1,105,086.61 × 438,211.21
4. Step 4: Simplify right side
   800,787.32x = 484,261,340,379.98
5. Step 5: Solve for x
   x = 484,261,340,379.98/800,787.32
6. Step 6: Final answer
   x = 604,731.53