Finding the Third Proportional to 91,870 and 196,860

Step by Step Solution

1. Step 1: Write the proportion equation
   91,870 : 196,860 = 196,860 : x
2. Step 2: Convert to fraction form
   91,870/196,860 = 196,860/x
3. Step 3: Cross multiply
   91,870x = 196,860 × 196,860
4. Step 4: Simplify right side
   91,870x = 38,753,859,600
5. Step 5: Solve for x
   x = 38,753,859,600/91,870
6. Step 6: Final answer
   x = 421,833.67