Finding the Third Proportional to 85,119 and 128,863.50

Step by Step Solution

1. Step 1: Write the proportion equation
   85,119 : 128,863.50 = 128,863.50 : x
2. Step 2: Convert to fraction form
   85,119/128,863.50 = 128,863.50/x
3. Step 3: Cross multiply
   85,119x = 128,863.50 × 128,863.50
4. Step 4: Simplify right side
   85,119x = 16,605,801,632.25
5. Step 5: Solve for x
   x = 16,605,801,632.25/85,119
6. Step 6: Final answer
   x = 195,089.25