Finding the Third Proportional to 59,173.50 and 128,715

Step by Step Solution

1. Step 1: Write the proportion equation
   59,173.50 : 128,715 = 128,715 : x
2. Step 2: Convert to fraction form
   59,173.50/128,715 = 128,715/x
3. Step 3: Cross multiply
   59,173.50x = 128,715 × 128,715
4. Step 4: Simplify right side
   59,173.50x = 16,567,551,225
5. Step 5: Solve for x
   x = 16,567,551,225/59,173.50
6. Step 6: Final answer
   x = 279,982.61