Finding the Third Proportional to 118,426 and 253,736

Step by Step Solution

1. Step 1: Write the proportion equation
   118,426 : 253,736 = 253,736 : x
2. Step 2: Convert to fraction form
   118,426/253,736 = 253,736/x
3. Step 3: Cross multiply
   118,426x = 253,736 × 253,736
4. Step 4: Simplify right side
   118,426x = 64,381,957,696
5. Step 5: Solve for x
   x = 64,381,957,696/118,426
6. Step 6: Final answer
   x = 543,647.15