Finding the Third Proportional to 90,624 and 196,818

Step by Step Solution

1. Step 1: Write the proportion equation
   90,624 : 196,818 = 196,818 : x
2. Step 2: Convert to fraction form
   90,624/196,818 = 196,818/x
3. Step 3: Cross multiply
   90,624x = 196,818 × 196,818
4. Step 4: Simplify right side
   90,624x = 38,737,325,124
5. Step 5: Solve for x
   x = 38,737,325,124/90,624
6. Step 6: Final answer
   x = 427,451.06