Finding the Third Proportional to 622,938 and 978,677

Step by Step Solution

1. Step 1: Write the proportion equation
   622,938 : 978,677 = 978,677 : x
2. Step 2: Convert to fraction form
   622,938/978,677 = 978,677/x
3. Step 3: Cross multiply
   622,938x = 978,677 × 978,677
4. Step 4: Simplify right side
   622,938x = 957,808,670,329
5. Step 5: Solve for x
   x = 957,808,670,329/622,938
6. Step 6: Final answer
   x = 1,537,566.61