Finding the Third Proportional to 196,290 and 423,666

Step by Step Solution

1. Step 1: Write the proportion equation
   196,290 : 423,666 = 423,666 : x
2. Step 2: Convert to fraction form
   196,290/423,666 = 423,666/x
3. Step 3: Cross multiply
   196,290x = 423,666 × 423,666
4. Step 4: Simplify right side
   196,290x = 179,492,879,556
5. Step 5: Solve for x
   x = 179,492,879,556/196,290
6. Step 6: Final answer
   x = 914,427.02