Finding the Third Proportional to 59,155 and 128,291.50

Step by Step Solution

1. Step 1: Write the proportion equation
   59,155 : 128,291.50 = 128,291.50 : x
2. Step 2: Convert to fraction form
   59,155/128,291.50 = 128,291.50/x
3. Step 3: Cross multiply
   59,155x = 128,291.50 × 128,291.50
4. Step 4: Simplify right side
   59,155x = 16,458,708,972.25
5. Step 5: Solve for x
   x = 16,458,708,972.25/59,155
6. Step 6: Final answer
   x = 278,230.23