Finding the Third Proportional to 200,932 and 428,520

Step by Step Solution

1. Step 1: Write the proportion equation
   200,932 : 428,520 = 428,520 : x
2. Step 2: Convert to fraction form
   200,932/428,520 = 428,520/x
3. Step 3: Cross multiply
   200,932x = 428,520 × 428,520
4. Step 4: Simplify right side
   200,932x = 183,629,390,400
5. Step 5: Solve for x
   x = 183,629,390,400/200,932
6. Step 6: Final answer
   x = 913,888.23