Finding the Third Proportional to 142,938 and 215,863

Step by Step Solution

1. Step 1: Write the proportion equation
   142,938 : 215,863 = 215,863 : x
2. Step 2: Convert to fraction form
   142,938/215,863 = 215,863/x
3. Step 3: Cross multiply
   142,938x = 215,863 × 215,863
4. Step 4: Simplify right side
   142,938x = 46,596,834,769
5. Step 5: Solve for x
   x = 46,596,834,769/142,938
6. Step 6: Final answer
   x = 325,993.33