Finding the Third Proportional to 78,180 and 120,980

Step by Step Solution

1. Step 1: Write the proportion equation
   78,180 : 120,980 = 120,980 : x
2. Step 2: Convert to fraction form
   78,180/120,980 = 120,980/x
3. Step 3: Cross multiply
   78,180x = 120,980 × 120,980
4. Step 4: Simplify right side
   78,180x = 14,636,160,400
5. Step 5: Solve for x
   x = 14,636,160,400/78,180
6. Step 6: Final answer
   x = 187,211.06