Finding the Third Proportional to 448,564.50 and 979,689

Step by Step Solution

1. Step 1: Write the proportion equation
   448,564.50 : 979,689 = 979,689 : x
2. Step 2: Convert to fraction form
   448,564.50/979,689 = 979,689/x
3. Step 3: Cross multiply
   448,564.50x = 979,689 × 979,689
4. Step 4: Simplify right side
   448,564.50x = 959,790,536,721
5. Step 5: Solve for x
   x = 959,790,536,721/448,564.50
6. Step 6: Final answer
   x = 2,139,693.48