Finding the Third Proportional to 59,656.50 and 128,454.75

Step by Step Solution

1. Step 1: Write the proportion equation
   59,656.50 : 128,454.75 = 128,454.75 : x
2. Step 2: Convert to fraction form
   59,656.50/128,454.75 = 128,454.75/x
3. Step 3: Cross multiply
   59,656.50x = 128,454.75 × 128,454.75
4. Step 4: Simplify right side
   59,656.50x = 16,500,622,797.56
5. Step 5: Solve for x
   x = 16,500,622,797.56/59,656.50
6. Step 6: Final answer
   x = 276,593.88