Finding the Third Proportional to 90,506 and 198,818.50

Step by Step Solution

1. Step 1: Write the proportion equation
   90,506 : 198,818.50 = 198,818.50 : x
2. Step 2: Convert to fraction form
   90,506/198,818.50 = 198,818.50/x
3. Step 3: Cross multiply
   90,506x = 198,818.50 × 198,818.50
4. Step 4: Simplify right side
   90,506x = 39,528,795,942.25
5. Step 5: Solve for x
   x = 39,528,795,942.25/90,506
6. Step 6: Final answer
   x = 436,753.32