Finding the Third Proportional to 422,836.50 and 921,990

Step by Step Solution

1. Step 1: Write the proportion equation
   422,836.50 : 921,990 = 921,990 : x
2. Step 2: Convert to fraction form
   422,836.50/921,990 = 921,990/x
3. Step 3: Cross multiply
   422,836.50x = 921,990 × 921,990
4. Step 4: Simplify right side
   422,836.50x = 850,065,560,100
5. Step 5: Solve for x
   x = 850,065,560,100/422,836.50
6. Step 6: Final answer
   x = 2,010,388.32