Finding the Third Proportional to 684,709.50 and 1,068,517.50

Step by Step Solution

1. Step 1: Write the proportion equation
   684,709.50 : 1,068,517.50 = 1,068,517.50 : x
2. Step 2: Convert to fraction form
   684,709.50/1,068,517.50 = 1,068,517.50/x
3. Step 3: Cross multiply
   684,709.50x = 1,068,517.50 × 1,068,517.50
4. Step 4: Simplify right side
   684,709.50x = 1,141,729,647,806.25
5. Step 5: Solve for x
   x = 1,141,729,647,806.25/684,709.50
6. Step 6: Final answer
   x = 1,667,465.76