Finding the Third Proportional to 60,767 and 91,990

Step by Step Solution

1. Step 1: Write the proportion equation
   60,767 : 91,990 = 91,990 : x
2. Step 2: Convert to fraction form
   60,767/91,990 = 91,990/x
3. Step 3: Cross multiply
   60,767x = 91,990 × 91,990
4. Step 4: Simplify right side
   60,767x = 8,462,160,100
5. Step 5: Solve for x
   x = 8,462,160,100/60,767
6. Step 6: Final answer
   x = 139,255.85