Finding the Third Proportional to 90,776.50 and 139,993

Step by Step Solution

1. Step 1: Write the proportion equation
   90,776.50 : 139,993 = 139,993 : x
2. Step 2: Convert to fraction form
   90,776.50/139,993 = 139,993/x
3. Step 3: Cross multiply
   90,776.50x = 139,993 × 139,993
4. Step 4: Simplify right side
   90,776.50x = 19,598,040,049
5. Step 5: Solve for x
   x = 19,598,040,049/90,776.50
6. Step 6: Final answer
   x = 215,893.32