Finding the Third Proportional to 91,189.50 and 136,419

Step by Step Solution

1. Step 1: Write the proportion equation
   91,189.50 : 136,419 = 136,419 : x
2. Step 2: Convert to fraction form
   91,189.50/136,419 = 136,419/x
3. Step 3: Cross multiply
   91,189.50x = 136,419 × 136,419
4. Step 4: Simplify right side
   91,189.50x = 18,610,143,561
5. Step 5: Solve for x
   x = 18,610,143,561/91,189.50
6. Step 6: Final answer
   x = 204,082.09