Finding the Third Proportional to 91,082 and 139,387

Step by Step Solution

1. Step 1: Write the proportion equation
   91,082 : 139,387 = 139,387 : x
2. Step 2: Convert to fraction form
   91,082/139,387 = 139,387/x
3. Step 3: Cross multiply
   91,082x = 139,387 × 139,387
4. Step 4: Simplify right side
   91,082x = 19,428,735,769
5. Step 5: Solve for x
   x = 19,428,735,769/91,082
6. Step 6: Final answer
   x = 213,310.38