Finding the Third Proportional to 638,620 and 1,064,325

Step by Step Solution

1. Step 1: Write the proportion equation
   638,620 : 1,064,325 = 1,064,325 : x
2. Step 2: Convert to fraction form
   638,620/1,064,325 = 1,064,325/x
3. Step 3: Cross multiply
   638,620x = 1,064,325 × 1,064,325
4. Step 4: Simplify right side
   638,620x = 1,132,787,705,625
5. Step 5: Solve for x
   x = 1,132,787,705,625/638,620
6. Step 6: Final answer
   x = 1,773,805.56