Finding the Third Proportional to 56,400 and 123,877

Step by Step Solution

1. Step 1: Write the proportion equation
   56,400 : 123,877 = 123,877 : x
2. Step 2: Convert to fraction form
   56,400/123,877 = 123,877/x
3. Step 3: Cross multiply
   56,400x = 123,877 × 123,877
4. Step 4: Simplify right side
   56,400x = 15,345,511,129
5. Step 5: Solve for x
   x = 15,345,511,129/56,400
6. Step 6: Final answer
   x = 272,083.53