Finding the Third Proportional to 503,450 and 777,743.50

Step by Step Solution

1. Step 1: Write the proportion equation
   503,450 : 777,743.50 = 777,743.50 : x
2. Step 2: Convert to fraction form
   503,450/777,743.50 = 777,743.50/x
3. Step 3: Cross multiply
   503,450x = 777,743.50 × 777,743.50
4. Step 4: Simplify right side
   503,450x = 604,884,951,792.25
5. Step 5: Solve for x
   x = 604,884,951,792.25/503,450
6. Step 6: Final answer
   x = 1,201,479.69