Finding the Third Proportional to 642,496.50 and 1,428,606

Step by Step Solution

1. Step 1: Write the proportion equation
   642,496.50 : 1,428,606 = 1,428,606 : x
2. Step 2: Convert to fraction form
   642,496.50/1,428,606 = 1,428,606/x
3. Step 3: Cross multiply
   642,496.50x = 1,428,606 × 1,428,606
4. Step 4: Simplify right side
   642,496.50x = 2,040,915,103,236
5. Step 5: Solve for x
   x = 2,040,915,103,236/642,496.50
6. Step 6: Final answer
   x = 3,176,538.87