Finding the Third Proportional to 18,128 and 40,142

Step by Step Solution

1. Step 1: Write the proportion equation
   18,128 : 40,142 = 40,142 : x
2. Step 2: Convert to fraction form
   18,128/40,142 = 40,142/x
3. Step 3: Cross multiply
   18,128x = 40,142 × 40,142
4. Step 4: Simplify right side
   18,128x = 1,611,380,164
5. Step 5: Solve for x
   x = 1,611,380,164/18,128
6. Step 6: Final answer
   x = 88,889.02