Finding the Third Proportional to 638,793 and 988,949.25

Step by Step Solution

1. Step 1: Write the proportion equation
   638,793 : 988,949.25 = 988,949.25 : x
2. Step 2: Convert to fraction form
   638,793/988,949.25 = 988,949.25/x
3. Step 3: Cross multiply
   638,793x = 988,949.25 × 988,949.25
4. Step 4: Simplify right side
   638,793x = 978,020,619,075.56
5. Step 5: Solve for x
   x = 978,020,619,075.56/638,793
6. Step 6: Final answer
   x = 1,531,044.67