Finding the Third Proportional to 56,376 and 123,912

Step by Step Solution

1. Step 1: Write the proportion equation
   56,376 : 123,912 = 123,912 : x
2. Step 2: Convert to fraction form
   56,376/123,912 = 123,912/x
3. Step 3: Cross multiply
   56,376x = 123,912 × 123,912
4. Step 4: Simplify right side
   56,376x = 15,354,183,744
5. Step 5: Solve for x
   x = 15,354,183,744/56,376
6. Step 6: Final answer
   x = 272,353.20