Finding the Third Proportional to 62,273 and 128,978

Step by Step Solution

1. Step 1: Write the proportion equation
   62,273 : 128,978 = 128,978 : x
2. Step 2: Convert to fraction form
   62,273/128,978 = 128,978/x
3. Step 3: Cross multiply
   62,273x = 128,978 × 128,978
4. Step 4: Simplify right side
   62,273x = 16,635,324,484
5. Step 5: Solve for x
   x = 16,635,324,484/62,273
6. Step 6: Final answer
   x = 267,135.43