Finding the Third Proportional to 684,252 and 985,639.50

Step by Step Solution

1. Step 1: Write the proportion equation
   684,252 : 985,639.50 = 985,639.50 : x
2. Step 2: Convert to fraction form
   684,252/985,639.50 = 985,639.50/x
3. Step 3: Cross multiply
   684,252x = 985,639.50 × 985,639.50
4. Step 4: Simplify right side
   684,252x = 971,485,223,960.25
5. Step 5: Solve for x
   x = 971,485,223,960.25/684,252
6. Step 6: Final answer
   x = 1,419,776.96