Finding the Third Proportional to 683,404 and 1,086,139.50

Step by Step Solution

1. Step 1: Write the proportion equation
   683,404 : 1,086,139.50 = 1,086,139.50 : x
2. Step 2: Convert to fraction form
   683,404/1,086,139.50 = 1,086,139.50/x
3. Step 3: Cross multiply
   683,404x = 1,086,139.50 × 1,086,139.50
4. Step 4: Simplify right side
   683,404x = 1,179,699,013,460.25
5. Step 5: Solve for x
   x = 1,179,699,013,460.25/683,404
6. Step 6: Final answer
   x = 1,726,210.28