Finding the Fourth Proportional to 443,123.76, 663,519.24 and 265,208.88

Step by Step Solution

1. Step 1: Write the proportion equation
   443,123.76 : 663,519.24 = 265,208.88 : x
2. Step 2: Convert to fraction form
   443,123.76/663,519.24 = 265,208.88/x
3. Step 3: Cross multiply
   443,123.76x = 663,519.24 × 265,208.88
4. Step 4: Simplify right side
   443,123.76x = 175,971,194,498.85
5. Step 5: Solve for x
   x = 175,971,194,498.85/443,123.76
6. Step 6: Final answer
   x = 397,115.23