Finding the Third Proportional to 168,958 and 392,870

Step by Step Solution

1. Step 1: Write the proportion equation
   168,958 : 392,870 = 392,870 : x
2. Step 2: Convert to fraction form
   168,958/392,870 = 392,870/x
3. Step 3: Cross multiply
   168,958x = 392,870 × 392,870
4. Step 4: Simplify right side
   168,958x = 154,346,836,900
5. Step 5: Solve for x
   x = 154,346,836,900/168,958
6. Step 6: Final answer
   x = 913,521.92