Finding the Fourth Proportional to 443,727.72, 611,054.28 and 385,560

Step by Step Solution

1. Step 1: Write the proportion equation
   443,727.72 : 611,054.28 = 385,560 : x
2. Step 2: Convert to fraction form
   443,727.72/611,054.28 = 385,560/x
3. Step 3: Cross multiply
   443,727.72x = 611,054.28 × 385,560
4. Step 4: Simplify right side
   443,727.72x = 235,598,088,196.80
5. Step 5: Solve for x
   x = 235,598,088,196.80/443,727.72
6. Step 6: Final answer
   x = 530,951.93