Finding the Third Proportional to 639,287 and 970,594.50

Step by Step Solution

1. Step 1: Write the proportion equation
   639,287 : 970,594.50 = 970,594.50 : x
2. Step 2: Convert to fraction form
   639,287/970,594.50 = 970,594.50/x
3. Step 3: Cross multiply
   639,287x = 970,594.50 × 970,594.50
4. Step 4: Simplify right side
   639,287x = 942,053,683,430.25
5. Step 5: Solve for x
   x = 942,053,683,430.25/639,287
6. Step 6: Final answer
   x = 1,473,600.56