Finding the Third Proportional to 301,825.50 and 639,622.50

Step by Step Solution

1. Step 1: Write the proportion equation
   301,825.50 : 639,622.50 = 639,622.50 : x
2. Step 2: Convert to fraction form
   301,825.50/639,622.50 = 639,622.50/x
3. Step 3: Cross multiply
   301,825.50x = 639,622.50 × 639,622.50
4. Step 4: Simplify right side
   301,825.50x = 409,116,942,506.25
5. Step 5: Solve for x
   x = 409,116,942,506.25/301,825.50
6. Step 6: Final answer
   x = 1,355,475.08