Finding the Third Proportional to 199,640 and 435,410

Step by Step Solution

1. Step 1: Write the proportion equation
   199,640 : 435,410 = 435,410 : x
2. Step 2: Convert to fraction form
   199,640/435,410 = 435,410/x
3. Step 3: Cross multiply
   199,640x = 435,410 × 435,410
4. Step 4: Simplify right side
   199,640x = 189,581,868,100
5. Step 5: Solve for x
   x = 189,581,868,100/199,640
6. Step 6: Final answer
   x = 949,618.65