Finding the Third Proportional to 428,040 and 635,898

Step by Step Solution

1. Step 1: Write the proportion equation
   428,040 : 635,898 = 635,898 : x
2. Step 2: Convert to fraction form
   428,040/635,898 = 635,898/x
3. Step 3: Cross multiply
   428,040x = 635,898 × 635,898
4. Step 4: Simplify right side
   428,040x = 404,366,266,404
5. Step 5: Solve for x
   x = 404,366,266,404/428,040
6. Step 6: Final answer
   x = 944,692.71