Finding the Third Proportional to 57,415.50 and 123,136.88

Step by Step Solution

1. Step 1: Write the proportion equation
   57,415.50 : 123,136.88 = 123,136.88 : x
2. Step 2: Convert to fraction form
   57,415.50/123,136.88 = 123,136.88/x
3. Step 3: Cross multiply
   57,415.50x = 123,136.88 × 123,136.88
4. Step 4: Simplify right side
   57,415.50x = 15,162,689,984.77
5. Step 5: Solve for x
   x = 15,162,689,984.77/57,415.50
6. Step 6: Final answer
   x = 264,087.05