Finding the Third Proportional to 142,862 and 215,589

Step by Step Solution

1. Step 1: Write the proportion equation
   142,862 : 215,589 = 215,589 : x
2. Step 2: Convert to fraction form
   142,862/215,589 = 215,589/x
3. Step 3: Cross multiply
   142,862x = 215,589 × 215,589
4. Step 4: Simplify right side
   142,862x = 46,478,616,921
5. Step 5: Solve for x
   x = 46,478,616,921/142,862
6. Step 6: Final answer
   x = 325,339.26