Finding the Third Proportional to 56,087 and 123,839

Step by Step Solution

1. Step 1: Write the proportion equation
   56,087 : 123,839 = 123,839 : x
2. Step 2: Convert to fraction form
   56,087/123,839 = 123,839/x
3. Step 3: Cross multiply
   56,087x = 123,839 × 123,839
4. Step 4: Simplify right side
   56,087x = 15,336,097,921
5. Step 5: Solve for x
   x = 15,336,097,921/56,087
6. Step 6: Final answer
   x = 273,434.09