Finding the Third Proportional to 672,678 and 999,436.50

Step by Step Solution

1. Step 1: Write the proportion equation
   672,678 : 999,436.50 = 999,436.50 : x
2. Step 2: Convert to fraction form
   672,678/999,436.50 = 999,436.50/x
3. Step 3: Cross multiply
   672,678x = 999,436.50 × 999,436.50
4. Step 4: Simplify right side
   672,678x = 998,873,317,532.25
5. Step 5: Solve for x
   x = 998,873,317,532.25/672,678
6. Step 6: Final answer
   x = 1,484,920.45