Finding the Third Proportional to 109,459.50 and 139,866

Step by Step Solution

1. Step 1: Write the proportion equation
   109,459.50 : 139,866 = 139,866 : x
2. Step 2: Convert to fraction form
   109,459.50/139,866 = 139,866/x
3. Step 3: Cross multiply
   109,459.50x = 139,866 × 139,866
4. Step 4: Simplify right side
   109,459.50x = 19,562,497,956
5. Step 5: Solve for x
   x = 19,562,497,956/109,459.50
6. Step 6: Final answer
   x = 178,719.05