Finding the Third Proportional to 306,361 and 448,861.50

Step by Step Solution

1. Step 1: Write the proportion equation
   306,361 : 448,861.50 = 448,861.50 : x
2. Step 2: Convert to fraction form
   306,361/448,861.50 = 448,861.50/x
3. Step 3: Cross multiply
   306,361x = 448,861.50 × 448,861.50
4. Step 4: Simplify right side
   306,361x = 201,476,646,182.25
5. Step 5: Solve for x
   x = 201,476,646,182.25/306,361
6. Step 6: Final answer
   x = 657,644.56