Finding the Third Proportional to 668,839 and 1,010,389

Step by Step Solution

1. Step 1: Write the proportion equation
   668,839 : 1,010,389 = 1,010,389 : x
2. Step 2: Convert to fraction form
   668,839/1,010,389 = 1,010,389/x
3. Step 3: Cross multiply
   668,839x = 1,010,389 × 1,010,389
4. Step 4: Simplify right side
   668,839x = 1,020,885,931,321
5. Step 5: Solve for x
   x = 1,020,885,931,321/668,839
6. Step 6: Final answer
   x = 1,526,355.27