Finding the Third Proportional to 131,461 and 143,170

Step by Step Solution

1. Step 1: Write the proportion equation
   131,461 : 143,170 = 143,170 : x
2. Step 2: Convert to fraction form
   131,461/143,170 = 143,170/x
3. Step 3: Cross multiply
   131,461x = 143,170 × 143,170
4. Step 4: Simplify right side
   131,461x = 20,497,648,900
5. Step 5: Solve for x
   x = 20,497,648,900/131,461
6. Step 6: Final answer
   x = 155,921.90