Finding the Third Proportional to 56,428 and 123,976

Step by Step Solution

1. Step 1: Write the proportion equation
   56,428 : 123,976 = 123,976 : x
2. Step 2: Convert to fraction form
   56,428/123,976 = 123,976/x
3. Step 3: Cross multiply
   56,428x = 123,976 × 123,976
4. Step 4: Simplify right side
   56,428x = 15,370,048,576
5. Step 5: Solve for x
   x = 15,370,048,576/56,428
6. Step 6: Final answer
   x = 272,383.37