Finding the Third Proportional to 90,978 and 133,866

Step by Step Solution

1. Step 1: Write the proportion equation
   90,978 : 133,866 = 133,866 : x
2. Step 2: Convert to fraction form
   90,978/133,866 = 133,866/x
3. Step 3: Cross multiply
   90,978x = 133,866 × 133,866
4. Step 4: Simplify right side
   90,978x = 17,920,105,956
5. Step 5: Solve for x
   x = 17,920,105,956/90,978
6. Step 6: Final answer
   x = 196,971.86