Finding the Third Proportional to 56,790 and 123,492

Step by Step Solution

1. Step 1: Write the proportion equation
   56,790 : 123,492 = 123,492 : x
2. Step 2: Convert to fraction form
   56,790/123,492 = 123,492/x
3. Step 3: Cross multiply
   56,790x = 123,492 × 123,492
4. Step 4: Simplify right side
   56,790x = 15,250,274,064
5. Step 5: Solve for x
   x = 15,250,274,064/56,790
6. Step 6: Final answer
   x = 268,538.02