Finding the Third Proportional to 289,773 and 443,266.50

Step by Step Solution

1. Step 1: Write the proportion equation
   289,773 : 443,266.50 = 443,266.50 : x
2. Step 2: Convert to fraction form
   289,773/443,266.50 = 443,266.50/x
3. Step 3: Cross multiply
   289,773x = 443,266.50 × 443,266.50
4. Step 4: Simplify right side
   289,773x = 196,485,190,022.25
5. Step 5: Solve for x
   x = 196,485,190,022.25/289,773
6. Step 6: Final answer
   x = 678,065.90