Finding the Third Proportional to 196,690.50 and 422,055

Step by Step Solution

1. Step 1: Write the proportion equation
   196,690.50 : 422,055 = 422,055 : x
2. Step 2: Convert to fraction form
   196,690.50/422,055 = 422,055/x
3. Step 3: Cross multiply
   196,690.50x = 422,055 × 422,055
4. Step 4: Simplify right side
   196,690.50x = 178,130,423,025
5. Step 5: Solve for x
   x = 178,130,423,025/196,690.50
6. Step 6: Final answer
   x = 905,638.16