Finding the Third Proportional to 308,339.50 and 650,419

Step by Step Solution

1. Step 1: Write the proportion equation
   308,339.50 : 650,419 = 650,419 : x
2. Step 2: Convert to fraction form
   308,339.50/650,419 = 650,419/x
3. Step 3: Cross multiply
   308,339.50x = 650,419 × 650,419
4. Step 4: Simplify right side
   308,339.50x = 423,044,875,561
5. Step 5: Solve for x
   x = 423,044,875,561/308,339.50
6. Step 6: Final answer
   x = 1,372,009.99