Finding the Third Proportional to 78,870 and 168,812

Step by Step Solution

1. Step 1: Write the proportion equation
   78,870 : 168,812 = 168,812 : x
2. Step 2: Convert to fraction form
   78,870/168,812 = 168,812/x
3. Step 3: Cross multiply
   78,870x = 168,812 × 168,812
4. Step 4: Simplify right side
   78,870x = 28,497,491,344
5. Step 5: Solve for x
   x = 28,497,491,344/78,870
6. Step 6: Final answer
   x = 361,322.32