Finding the Third Proportional to 22,621 and 40,139

Step by Step Solution

1. Step 1: Write the proportion equation
   22,621 : 40,139 = 40,139 : x
2. Step 2: Convert to fraction form
   22,621/40,139 = 40,139/x
3. Step 3: Cross multiply
   22,621x = 40,139 × 40,139
4. Step 4: Simplify right side
   22,621x = 1,611,139,321
5. Step 5: Solve for x
   x = 1,611,139,321/22,621
6. Step 6: Final answer
   x = 71,223.17