Finding the Third Proportional to 89,218.50 and 128,238

Step by Step Solution

1. Step 1: Write the proportion equation
   89,218.50 : 128,238 = 128,238 : x
2. Step 2: Convert to fraction form
   89,218.50/128,238 = 128,238/x
3. Step 3: Cross multiply
   89,218.50x = 128,238 × 128,238
4. Step 4: Simplify right side
   89,218.50x = 16,444,984,644
5. Step 5: Solve for x
   x = 16,444,984,644/89,218.50
6. Step 6: Final answer
   x = 184,322.59