Finding the Third Proportional to 128,123.25 and 275,200.50

Step by Step Solution

1. Step 1: Write the proportion equation
   128,123.25 : 275,200.50 = 275,200.50 : x
2. Step 2: Convert to fraction form
   128,123.25/275,200.50 = 275,200.50/x
3. Step 3: Cross multiply
   128,123.25x = 275,200.50 × 275,200.50
4. Step 4: Simplify right side
   128,123.25x = 75,735,315,200.25
5. Step 5: Solve for x
   x = 75,735,315,200.25/128,123.25
6. Step 6: Final answer
   x = 591,112.97