Finding the Third Proportional to 422,383.50 and 919,128

Step by Step Solution

1. Step 1: Write the proportion equation
   422,383.50 : 919,128 = 919,128 : x
2. Step 2: Convert to fraction form
   422,383.50/919,128 = 919,128/x
3. Step 3: Cross multiply
   422,383.50x = 919,128 × 919,128
4. Step 4: Simplify right side
   422,383.50x = 844,796,280,384
5. Step 5: Solve for x
   x = 844,796,280,384/422,383.50
6. Step 6: Final answer
   x = 2,000,069.32