Finding the Fourth Proportional to 443,294.88, 664,482.72 and 206,442.72

Step by Step Solution

1. Step 1: Write the proportion equation
   443,294.88 : 664,482.72 = 206,442.72 : x
2. Step 2: Convert to fraction form
   443,294.88/664,482.72 = 206,442.72/x
3. Step 3: Cross multiply
   443,294.88x = 664,482.72 × 206,442.72
4. Step 4: Simplify right side
   443,294.88x = 137,177,620,109.80
5. Step 5: Solve for x
   x = 137,177,620,109.80/443,294.88
6. Step 6: Final answer
   x = 309,450.04