Finding the Third Proportional to 552,666 and 810,868.50

Step by Step Solution

1. Step 1: Write the proportion equation
   552,666 : 810,868.50 = 810,868.50 : x
2. Step 2: Convert to fraction form
   552,666/810,868.50 = 810,868.50/x
3. Step 3: Cross multiply
   552,666x = 810,868.50 × 810,868.50
4. Step 4: Simplify right side
   552,666x = 657,507,724,292.25
5. Step 5: Solve for x
   x = 657,507,724,292.25/552,666
6. Step 6: Final answer
   x = 1,189,701.78