Finding the Third Proportional to 428,076 and 635,940

Step by Step Solution

1. Step 1: Write the proportion equation
   428,076 : 635,940 = 635,940 : x
2. Step 2: Convert to fraction form
   428,076/635,940 = 635,940/x
3. Step 3: Cross multiply
   428,076x = 635,940 × 635,940
4. Step 4: Simplify right side
   428,076x = 404,419,683,600
5. Step 5: Solve for x
   x = 404,419,683,600/428,076
6. Step 6: Final answer
   x = 944,738.05