Finding the Third Proportional to 422,440 and 654,532.50

Step by Step Solution

1. Step 1: Write the proportion equation
   422,440 : 654,532.50 = 654,532.50 : x
2. Step 2: Convert to fraction form
   422,440/654,532.50 = 654,532.50/x
3. Step 3: Cross multiply
   422,440x = 654,532.50 × 654,532.50
4. Step 4: Simplify right side
   422,440x = 428,412,793,556.25
5. Step 5: Solve for x
   x = 428,412,793,556.25/422,440
6. Step 6: Final answer
   x = 1,014,138.80