Finding the Third Proportional to 301,078.50 and 649,156.50

Step by Step Solution

1. Step 1: Write the proportion equation
   301,078.50 : 649,156.50 = 649,156.50 : x
2. Step 2: Convert to fraction form
   301,078.50/649,156.50 = 649,156.50/x
3. Step 3: Cross multiply
   301,078.50x = 649,156.50 × 649,156.50
4. Step 4: Simplify right side
   301,078.50x = 421,404,161,492.25
5. Step 5: Solve for x
   x = 421,404,161,492.25/301,078.50
6. Step 6: Final answer
   x = 1,399,648.80