Finding the Third Proportional to 131,145 and 208,540

Step by Step Solution

1. Step 1: Write the proportion equation
   131,145 : 208,540 = 208,540 : x
2. Step 2: Convert to fraction form
   131,145/208,540 = 208,540/x
3. Step 3: Cross multiply
   131,145x = 208,540 × 208,540
4. Step 4: Simplify right side
   131,145x = 43,488,931,600
5. Step 5: Solve for x
   x = 43,488,931,600/131,145
6. Step 6: Final answer
   x = 331,609.53