Finding the Third Proportional to 59,428.50 and 129,519

Step by Step Solution

1. Step 1: Write the proportion equation
   59,428.50 : 129,519 = 129,519 : x
2. Step 2: Convert to fraction form
   59,428.50/129,519 = 129,519/x
3. Step 3: Cross multiply
   59,428.50x = 129,519 × 129,519
4. Step 4: Simplify right side
   59,428.50x = 16,775,171,361
5. Step 5: Solve for x
   x = 16,775,171,361/59,428.50
6. Step 6: Final answer
   x = 282,274.86