Finding the Third Proportional to 639,349.50 and 954,648

Step by Step Solution

1. Step 1: Write the proportion equation
   639,349.50 : 954,648 = 954,648 : x
2. Step 2: Convert to fraction form
   639,349.50/954,648 = 954,648/x
3. Step 3: Cross multiply
   639,349.50x = 954,648 × 954,648
4. Step 4: Simplify right side
   639,349.50x = 911,352,803,904
5. Step 5: Solve for x
   x = 911,352,803,904/639,349.50
6. Step 6: Final answer
   x = 1,425,437.58