Finding the Third Proportional to 503,965.50 and 780,325

Step by Step Solution

1. Step 1: Write the proportion equation
   503,965.50 : 780,325 = 780,325 : x
2. Step 2: Convert to fraction form
   503,965.50/780,325 = 780,325/x
3. Step 3: Cross multiply
   503,965.50x = 780,325 × 780,325
4. Step 4: Simplify right side
   503,965.50x = 608,907,105,625
5. Step 5: Solve for x
   x = 608,907,105,625/503,965.50
6. Step 6: Final answer
   x = 1,208,231.73