Finding the Third Proportional to 91,097 and 200,128

Step by Step Solution

1. Step 1: Write the proportion equation
   91,097 : 200,128 = 200,128 : x
2. Step 2: Convert to fraction form
   91,097/200,128 = 200,128/x
3. Step 3: Cross multiply
   91,097x = 200,128 × 200,128
4. Step 4: Simplify right side
   91,097x = 40,051,216,384
5. Step 5: Solve for x
   x = 40,051,216,384/91,097
6. Step 6: Final answer
   x = 439,654.61