Finding the Third Proportional to 306,072 and 661,324.50

Step by Step Solution

1. Step 1: Write the proportion equation
   306,072 : 661,324.50 = 661,324.50 : x
2. Step 2: Convert to fraction form
   306,072/661,324.50 = 661,324.50/x
3. Step 3: Cross multiply
   306,072x = 661,324.50 × 661,324.50
4. Step 4: Simplify right side
   306,072x = 437,350,094,300.25
5. Step 5: Solve for x
   x = 437,350,094,300.25/306,072
6. Step 6: Final answer
   x = 1,428,912.46