Finding the Third Proportional to 149,781.38 and 231,309

Step by Step Solution

1. Step 1: Write the proportion equation
   149,781.38 : 231,309 = 231,309 : x
2. Step 2: Convert to fraction form
   149,781.38/231,309 = 231,309/x
3. Step 3: Cross multiply
   149,781.38x = 231,309 × 231,309
4. Step 4: Simplify right side
   149,781.38x = 53,503,853,481
5. Step 5: Solve for x
   x = 53,503,853,481/149,781.38
6. Step 6: Final answer
   x = 357,212.99