Finding the Third Proportional to 686,910 and 1,010,488.50

Step by Step Solution

1. Step 1: Write the proportion equation
   686,910 : 1,010,488.50 = 1,010,488.50 : x
2. Step 2: Convert to fraction form
   686,910/1,010,488.50 = 1,010,488.50/x
3. Step 3: Cross multiply
   686,910x = 1,010,488.50 × 1,010,488.50
4. Step 4: Simplify right side
   686,910x = 1,021,087,008,632.25
5. Step 5: Solve for x
   x = 1,021,087,008,632.25/686,910
6. Step 6: Final answer
   x = 1,486,493.15