Finding the Third Proportional to 150,290 and 355,419

Step by Step Solution

1. Step 1: Write the proportion equation
   150,290 : 355,419 = 355,419 : x
2. Step 2: Convert to fraction form
   150,290/355,419 = 355,419/x
3. Step 3: Cross multiply
   150,290x = 355,419 × 355,419
4. Step 4: Simplify right side
   150,290x = 126,322,665,561
5. Step 5: Solve for x
   x = 126,322,665,561/150,290
6. Step 6: Final answer
   x = 840,526.09