Finding the Third Proportional to 30,139.50 and 63,519

Step by Step Solution

1. Step 1: Write the proportion equation
   30,139.50 : 63,519 = 63,519 : x
2. Step 2: Convert to fraction form
   30,139.50/63,519 = 63,519/x
3. Step 3: Cross multiply
   30,139.50x = 63,519 × 63,519
4. Step 4: Simplify right side
   30,139.50x = 4,034,663,361
5. Step 5: Solve for x
   x = 4,034,663,361/30,139.50
6. Step 6: Final answer
   x = 133,866.30