Finding the Third Proportional to 158,090 and 231,212

Step by Step Solution

1. Step 1: Write the proportion equation
   158,090 : 231,212 = 231,212 : x
2. Step 2: Convert to fraction form
   158,090/231,212 = 231,212/x
3. Step 3: Cross multiply
   158,090x = 231,212 × 231,212
4. Step 4: Simplify right side
   158,090x = 53,458,988,944
5. Step 5: Solve for x
   x = 53,458,988,944/158,090
6. Step 6: Final answer
   x = 338,155.41