Finding the Third Proportional to 131,440 and 200,412

Step by Step Solution

1. Step 1: Write the proportion equation
   131,440 : 200,412 = 200,412 : x
2. Step 2: Convert to fraction form
   131,440/200,412 = 200,412/x
3. Step 3: Cross multiply
   131,440x = 200,412 × 200,412
4. Step 4: Simplify right side
   131,440x = 40,164,969,744
5. Step 5: Solve for x
   x = 40,164,969,744/131,440
6. Step 6: Final answer
   x = 305,576.46