Finding the Third Proportional to 60,779 and 91,980

Step by Step Solution

1. Step 1: Write the proportion equation
   60,779 : 91,980 = 91,980 : x
2. Step 2: Convert to fraction form
   60,779/91,980 = 91,980/x
3. Step 3: Cross multiply
   60,779x = 91,980 × 91,980
4. Step 4: Simplify right side
   60,779x = 8,460,320,400
5. Step 5: Solve for x
   x = 8,460,320,400/60,779
6. Step 6: Final answer
   x = 139,198.08