Finding the Third Proportional to 54,136.69 and 83,318.63

Step by Step Solution

1. Step 1: Write the proportion equation
   54,136.69 : 83,318.63 = 83,318.63 : x
2. Step 2: Convert to fraction form
   54,136.69/83,318.63 = 83,318.63/x
3. Step 3: Cross multiply
   54,136.69x = 83,318.63 × 83,318.63
4. Step 4: Simplify right side
   54,136.69x = 6,941,993,271.89
5. Step 5: Solve for x
   x = 6,941,993,271.89/54,136.69
6. Step 6: Final answer
   x = 128,230.85