Finding the Third Proportional to 129,355.50 and 282,756

Step by Step Solution

1. Step 1: Write the proportion equation
   129,355.50 : 282,756 = 282,756 : x
2. Step 2: Convert to fraction form
   129,355.50/282,756 = 282,756/x
3. Step 3: Cross multiply
   129,355.50x = 282,756 × 282,756
4. Step 4: Simplify right side
   129,355.50x = 79,950,955,536
5. Step 5: Solve for x
   x = 79,950,955,536/129,355.50
6. Step 6: Final answer
   x = 618,071.56