Finding the Third Proportional to 67,980 and 105,000

Step by Step Solution

1. Step 1: Write the proportion equation
   67,980 : 105,000 = 105,000 : x
2. Step 2: Convert to fraction form
   67,980/105,000 = 105,000/x
3. Step 3: Cross multiply
   67,980x = 105,000 × 105,000
4. Step 4: Simplify right side
   67,980x = 11,025,000,000
5. Step 5: Solve for x
   x = 11,025,000,000/67,980
6. Step 6: Final answer
   x = 162,180.05