Finding the Third Proportional to 90,162 and 129,870

Step by Step Solution

1. Step 1: Write the proportion equation
   90,162 : 129,870 = 129,870 : x
2. Step 2: Convert to fraction form
   90,162/129,870 = 129,870/x
3. Step 3: Cross multiply
   90,162x = 129,870 × 129,870
4. Step 4: Simplify right side
   90,162x = 16,866,216,900
5. Step 5: Solve for x
   x = 16,866,216,900/90,162
6. Step 6: Final answer
   x = 187,065.69