Finding the Third Proportional to 422,648 and 626,986

Step by Step Solution

1. Step 1: Write the proportion equation
   422,648 : 626,986 = 626,986 : x
2. Step 2: Convert to fraction form
   422,648/626,986 = 626,986/x
3. Step 3: Cross multiply
   422,648x = 626,986 × 626,986
4. Step 4: Simplify right side
   422,648x = 393,111,444,196
5. Step 5: Solve for x
   x = 393,111,444,196/422,648
6. Step 6: Final answer
   x = 930,115.47