Finding the Third Proportional to 420,427.50 and 987,019.50

Step by Step Solution

1. Step 1: Write the proportion equation
   420,427.50 : 987,019.50 = 987,019.50 : x
2. Step 2: Convert to fraction form
   420,427.50/987,019.50 = 987,019.50/x
3. Step 3: Cross multiply
   420,427.50x = 987,019.50 × 987,019.50
4. Step 4: Simplify right side
   420,427.50x = 974,207,493,380.25
5. Step 5: Solve for x
   x = 974,207,493,380.25/420,427.50
6. Step 6: Final answer
   x = 2,317,183.09