Finding the Third Proportional to 56,789 and 123,521

Step by Step Solution

1. Step 1: Write the proportion equation
   56,789 : 123,521 = 123,521 : x
2. Step 2: Convert to fraction form
   56,789/123,521 = 123,521/x
3. Step 3: Cross multiply
   56,789x = 123,521 × 123,521
4. Step 4: Simplify right side
   56,789x = 15,257,437,441
5. Step 5: Solve for x
   x = 15,257,437,441/56,789
6. Step 6: Final answer
   x = 268,668.89