Finding the Third Proportional to 89,247 and 138,189.50

Step by Step Solution

1. Step 1: Write the proportion equation
   89,247 : 138,189.50 = 138,189.50 : x
2. Step 2: Convert to fraction form
   89,247/138,189.50 = 138,189.50/x
3. Step 3: Cross multiply
   89,247x = 138,189.50 × 138,189.50
4. Step 4: Simplify right side
   89,247x = 19,096,337,910.25
5. Step 5: Solve for x
   x = 19,096,337,910.25/89,247
6. Step 6: Final answer
   x = 213,971.76