Finding the Third Proportional to 55,638.56 and 123,715.69

Step by Step Solution

1. Step 1: Write the proportion equation
   55,638.56 : 123,715.69 = 123,715.69 : x
2. Step 2: Convert to fraction form
   55,638.56/123,715.69 = 123,715.69/x
3. Step 3: Cross multiply
   55,638.56x = 123,715.69 × 123,715.69
4. Step 4: Simplify right side
   55,638.56x = 15,305,571,333.60
5. Step 5: Solve for x
   x = 15,305,571,333.60/55,638.56
6. Step 6: Final answer
   x = 275,089.27