Finding the Third Proportional to 89,216.25 and 128,235.38

Step by Step Solution

1. Step 1: Write the proportion equation
   89,216.25 : 128,235.38 = 128,235.38 : x
2. Step 2: Convert to fraction form
   89,216.25/128,235.38 = 128,235.38/x
3. Step 3: Cross multiply
   89,216.25x = 128,235.38 × 128,235.38
4. Step 4: Simplify right side
   89,216.25x = 16,444,311,401.39
5. Step 5: Solve for x
   x = 16,444,311,401.39/89,216.25
6. Step 6: Final answer
   x = 184,319.69