Finding the Third Proportional to 56,306 and 123,790

Step by Step Solution

1. Step 1: Write the proportion equation
   56,306 : 123,790 = 123,790 : x
2. Step 2: Convert to fraction form
   56,306/123,790 = 123,790/x
3. Step 3: Cross multiply
   56,306x = 123,790 × 123,790
4. Step 4: Simplify right side
   56,306x = 15,323,964,100
5. Step 5: Solve for x
   x = 15,323,964,100/56,306
6. Step 6: Final answer
   x = 272,155.08