Finding the Fourth Proportional to 443,817.88, 612,479.46 and 269,390.05

Step by Step Solution

1. Step 1: Write the proportion equation
   443,817.88 : 612,479.46 = 269,390.05 : x
2. Step 2: Convert to fraction form
   443,817.88/612,479.46 = 269,390.05/x
3. Step 3: Cross multiply
   443,817.88x = 612,479.46 × 269,390.05
4. Step 4: Simplify right side
   443,817.88x = 164,995,872,353.37
5. Step 5: Solve for x
   x = 164,995,872,353.37/443,817.88
6. Step 6: Final answer
   x = 371,764.82