Finding the Third Proportional to 90,777 and 139,993.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,777 : 139,993.50 = 139,993.50 : x
2. Step 2: Convert to fraction form
   90,777/139,993.50 = 139,993.50/x
3. Step 3: Cross multiply
   90,777x = 139,993.50 × 139,993.50
4. Step 4: Simplify right side
   90,777x = 19,598,180,042.25
5. Step 5: Solve for x
   x = 19,598,180,042.25/90,777
6. Step 6: Final answer
   x = 215,893.67