Finding the Third Proportional to 40,268 and 53,243

Step by Step Solution

1. Step 1: Write the proportion equation
   40,268 : 53,243 = 53,243 : x
2. Step 2: Convert to fraction form
   40,268/53,243 = 53,243/x
3. Step 3: Cross multiply
   40,268x = 53,243 × 53,243
4. Step 4: Simplify right side
   40,268x = 2,834,817,049
5. Step 5: Solve for x
   x = 2,834,817,049/40,268
6. Step 6: Final answer
   x = 70,398.75