Finding the Third Proportional to 90,620 and 195,819.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,620 : 195,819.50 = 195,819.50 : x
2. Step 2: Convert to fraction form
   90,620/195,819.50 = 195,819.50/x
3. Step 3: Cross multiply
   90,620x = 195,819.50 × 195,819.50
4. Step 4: Simplify right side
   90,620x = 38,345,276,580.25
5. Step 5: Solve for x
   x = 38,345,276,580.25/90,620
6. Step 6: Final answer
   x = 423,143.64