Finding the Third Proportional to 200,914 and 428,484

Step by Step Solution

1. Step 1: Write the proportion equation
   200,914 : 428,484 = 428,484 : x
2. Step 2: Convert to fraction form
   200,914/428,484 = 428,484/x
3. Step 3: Cross multiply
   200,914x = 428,484 × 428,484
4. Step 4: Simplify right side
   200,914x = 183,598,538,256
5. Step 5: Solve for x
   x = 183,598,538,256/200,914
6. Step 6: Final answer
   x = 913,816.55