Finding the Third Proportional to 89,217 and 128,236.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89,217 : 128,236.50 = 128,236.50 : x
2. Step 2: Convert to fraction form
   89,217/128,236.50 = 128,236.50/x
3. Step 3: Cross multiply
   89,217x = 128,236.50 × 128,236.50
4. Step 4: Simplify right side
   89,217x = 16,444,599,932.25
5. Step 5: Solve for x
   x = 16,444,599,932.25/89,217
6. Step 6: Final answer
   x = 184,321.37