Finding the Third Proportional to 443,191.50 and 728,122.50

Step by Step Solution

1. Step 1: Write the proportion equation
   443,191.50 : 728,122.50 = 728,122.50 : x
2. Step 2: Convert to fraction form
   443,191.50/728,122.50 = 728,122.50/x
3. Step 3: Cross multiply
   443,191.50x = 728,122.50 × 728,122.50
4. Step 4: Simplify right side
   443,191.50x = 530,162,375,006.25
5. Step 5: Solve for x
   x = 530,162,375,006.25/443,191.50
6. Step 6: Final answer
   x = 1,196,237.69