Finding the Third Proportional to 56,743 and 123,430

Step by Step Solution

1. Step 1: Write the proportion equation
   56,743 : 123,430 = 123,430 : x
2. Step 2: Convert to fraction form
   56,743/123,430 = 123,430/x
3. Step 3: Cross multiply
   56,743x = 123,430 × 123,430
4. Step 4: Simplify right side
   56,743x = 15,234,964,900
5. Step 5: Solve for x
   x = 15,234,964,900/56,743
6. Step 6: Final answer
   x = 268,490.65