Finding the Third Proportional to 308,309.50 and 672,498

Step by Step Solution

1. Step 1: Write the proportion equation
   308,309.50 : 672,498 = 672,498 : x
2. Step 2: Convert to fraction form
   308,309.50/672,498 = 672,498/x
3. Step 3: Cross multiply
   308,309.50x = 672,498 × 672,498
4. Step 4: Simplify right side
   308,309.50x = 452,253,560,004
5. Step 5: Solve for x
   x = 452,253,560,004/308,309.50
6. Step 6: Final answer
   x = 1,466,881.69