Finding the Third Proportional to 68,978 and 105,472

Step by Step Solution

1. Step 1: Write the proportion equation
   68,978 : 105,472 = 105,472 : x
2. Step 2: Convert to fraction form
   68,978/105,472 = 105,472/x
3. Step 3: Cross multiply
   68,978x = 105,472 × 105,472
4. Step 4: Simplify right side
   68,978x = 11,124,342,784
5. Step 5: Solve for x
   x = 11,124,342,784/68,978
6. Step 6: Final answer
   x = 161,273.78