Finding the Third Proportional to 129,928.50 and 279,198

Step by Step Solution

1. Step 1: Write the proportion equation
   129,928.50 : 279,198 = 279,198 : x
2. Step 2: Convert to fraction form
   129,928.50/279,198 = 279,198/x
3. Step 3: Cross multiply
   129,928.50x = 279,198 × 279,198
4. Step 4: Simplify right side
   129,928.50x = 77,951,523,204
5. Step 5: Solve for x
   x = 77,951,523,204/129,928.50
6. Step 6: Final answer
   x = 599,957.08