Finding the Third Proportional to 56,436 and 126,240

Step by Step Solution

1. Step 1: Write the proportion equation
   56,436 : 126,240 = 126,240 : x
2. Step 2: Convert to fraction form
   56,436/126,240 = 126,240/x
3. Step 3: Cross multiply
   56,436x = 126,240 × 126,240
4. Step 4: Simplify right side
   56,436x = 15,936,537,600
5. Step 5: Solve for x
   x = 15,936,537,600/56,436
6. Step 6: Final answer
   x = 282,382.48