Finding the Third Proportional to 686,763 and 1,010,290

Step by Step Solution

1. Step 1: Write the proportion equation
   686,763 : 1,010,290 = 1,010,290 : x
2. Step 2: Convert to fraction form
   686,763/1,010,290 = 1,010,290/x
3. Step 3: Cross multiply
   686,763x = 1,010,290 × 1,010,290
4. Step 4: Simplify right side
   686,763x = 1,020,685,884,100
5. Step 5: Solve for x
   x = 1,020,685,884,100/686,763
6. Step 6: Final answer
   x = 1,486,227.25