Finding the Third Proportional to 611,430 and 880,693.50

Step by Step Solution

1. Step 1: Write the proportion equation
   611,430 : 880,693.50 = 880,693.50 : x
2. Step 2: Convert to fraction form
   611,430/880,693.50 = 880,693.50/x
3. Step 3: Cross multiply
   611,430x = 880,693.50 × 880,693.50
4. Step 4: Simplify right side
   611,430x = 775,621,040,942.25
5. Step 5: Solve for x
   x = 775,621,040,942.25/611,430
6. Step 6: Final answer
   x = 1,268,536.12