Finding the Third Proportional to 686,749.50 and 1,010,269.50

Step by Step Solution

1. Step 1: Write the proportion equation
   686,749.50 : 1,010,269.50 = 1,010,269.50 : x
2. Step 2: Convert to fraction form
   686,749.50/1,010,269.50 = 1,010,269.50/x
3. Step 3: Cross multiply
   686,749.50x = 1,010,269.50 × 1,010,269.50
4. Step 4: Simplify right side
   686,749.50x = 1,020,644,462,630.25
5. Step 5: Solve for x
   x = 1,020,644,462,630.25/686,749.50
6. Step 6: Final answer
   x = 1,486,196.15