Finding the Third Proportional to 638,010 and 1,391,928

Step by Step Solution

1. Step 1: Write the proportion equation
   638,010 : 1,391,928 = 1,391,928 : x
2. Step 2: Convert to fraction form
   638,010/1,391,928 = 1,391,928/x
3. Step 3: Cross multiply
   638,010x = 1,391,928 × 1,391,928
4. Step 4: Simplify right side
   638,010x = 1,937,463,557,184
5. Step 5: Solve for x
   x = 1,937,463,557,184/638,010
6. Step 6: Final answer
   x = 3,036,729.14