Finding the Third Proportional to 56,178.56 and 123,087.09

Step by Step Solution

1. Step 1: Write the proportion equation
   56,178.56 : 123,087.09 = 123,087.09 : x
2. Step 2: Convert to fraction form
   56,178.56/123,087.09 = 123,087.09/x
3. Step 3: Cross multiply
   56,178.56x = 123,087.09 × 123,087.09
4. Step 4: Simplify right side
   56,178.56x = 15,150,432,647.82
5. Step 5: Solve for x
   x = 15,150,432,647.82/56,178.56
6. Step 6: Final answer
   x = 269,683.52