Finding the Third Proportional to 59,474.25 and 128,749.50

Step by Step Solution

1. Step 1: Write the proportion equation
   59,474.25 : 128,749.50 = 128,749.50 : x
2. Step 2: Convert to fraction form
   59,474.25/128,749.50 = 128,749.50/x
3. Step 3: Cross multiply
   59,474.25x = 128,749.50 × 128,749.50
4. Step 4: Simplify right side
   59,474.25x = 16,576,433,750.25
5. Step 5: Solve for x
   x = 16,576,433,750.25/59,474.25
6. Step 6: Final answer
   x = 278,716.15