Finding the Third Proportional to 682,978.50 and 986,706

Step by Step Solution

1. Step 1: Write the proportion equation
   682,978.50 : 986,706 = 986,706 : x
2. Step 2: Convert to fraction form
   682,978.50/986,706 = 986,706/x
3. Step 3: Cross multiply
   682,978.50x = 986,706 × 986,706
4. Step 4: Simplify right side
   682,978.50x = 973,588,730,436
5. Step 5: Solve for x
   x = 973,588,730,436/682,978.50
6. Step 6: Final answer
   x = 1,425,504.21