Finding the Third Proportional to 519,811 and 783,556.50

Step by Step Solution

1. Step 1: Write the proportion equation
   519,811 : 783,556.50 = 783,556.50 : x
2. Step 2: Convert to fraction form
   519,811/783,556.50 = 783,556.50/x
3. Step 3: Cross multiply
   519,811x = 783,556.50 × 783,556.50
4. Step 4: Simplify right side
   519,811x = 613,960,788,692.25
5. Step 5: Solve for x
   x = 613,960,788,692.25/519,811
6. Step 6: Final answer
   x = 1,181,123.12