Finding the Third Proportional to 111,940 and 155,147

Step by Step Solution

1. Step 1: Write the proportion equation
   111,940 : 155,147 = 155,147 : x
2. Step 2: Convert to fraction form
   111,940/155,147 = 155,147/x
3. Step 3: Cross multiply
   111,940x = 155,147 × 155,147
4. Step 4: Simplify right side
   111,940x = 24,070,591,609
5. Step 5: Solve for x
   x = 24,070,591,609/111,940
6. Step 6: Final answer
   x = 215,031.19