Finding the Third Proportional to 128,759.50 and 173,266.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,759.50 : 173,266.50 = 173,266.50 : x
2. Step 2: Convert to fraction form
   128,759.50/173,266.50 = 173,266.50/x
3. Step 3: Cross multiply
   128,759.50x = 173,266.50 × 173,266.50
4. Step 4: Simplify right side
   128,759.50x = 30,021,280,022.25
5. Step 5: Solve for x
   x = 30,021,280,022.25/128,759.50
6. Step 6: Final answer
   x = 233,157.79