Finding the Third Proportional to 58,986 and 128,338.50

Step by Step Solution

1. Step 1: Write the proportion equation
   58,986 : 128,338.50 = 128,338.50 : x
2. Step 2: Convert to fraction form
   58,986/128,338.50 = 128,338.50/x
3. Step 3: Cross multiply
   58,986x = 128,338.50 × 128,338.50
4. Step 4: Simplify right side
   58,986x = 16,470,770,582.25
5. Step 5: Solve for x
   x = 16,470,770,582.25/58,986
6. Step 6: Final answer
   x = 279,231.86