Finding the Third Proportional to 422,739 and 653,791.50

Step by Step Solution

1. Step 1: Write the proportion equation
   422,739 : 653,791.50 = 653,791.50 : x
2. Step 2: Convert to fraction form
   422,739/653,791.50 = 653,791.50/x
3. Step 3: Cross multiply
   422,739x = 653,791.50 × 653,791.50
4. Step 4: Simplify right side
   422,739x = 427,443,325,472.25
5. Step 5: Solve for x
   x = 427,443,325,472.25/422,739
6. Step 6: Final answer
   x = 1,011,128.20