Finding the Third Proportional to 429,139.50 and 649,233.50

Step by Step Solution

1. Step 1: Write the proportion equation
   429,139.50 : 649,233.50 = 649,233.50 : x
2. Step 2: Convert to fraction form
   429,139.50/649,233.50 = 649,233.50/x
3. Step 3: Cross multiply
   429,139.50x = 649,233.50 × 649,233.50
4. Step 4: Simplify right side
   429,139.50x = 421,504,137,522.25
5. Step 5: Solve for x
   x = 421,504,137,522.25/429,139.50
6. Step 6: Final answer
   x = 982,207.74