Finding the Third Proportional to 56,911 and 123,911

Step by Step Solution

1. Step 1: Write the proportion equation
   56,911 : 123,911 = 123,911 : x
2. Step 2: Convert to fraction form
   56,911/123,911 = 123,911/x
3. Step 3: Cross multiply
   56,911x = 123,911 × 123,911
4. Step 4: Simplify right side
   56,911x = 15,353,935,921
5. Step 5: Solve for x
   x = 15,353,935,921/56,911
6. Step 6: Final answer
   x = 269,788.55