Finding the Third Proportional to 200,018 and 426,820

Step by Step Solution

1. Step 1: Write the proportion equation
   200,018 : 426,820 = 426,820 : x
2. Step 2: Convert to fraction form
   200,018/426,820 = 426,820/x
3. Step 3: Cross multiply
   200,018x = 426,820 × 426,820
4. Step 4: Simplify right side
   200,018x = 182,175,312,400
5. Step 5: Solve for x
   x = 182,175,312,400/200,018
6. Step 6: Final answer
   x = 910,794.59