Finding the Third Proportional to 91,334 and 200,128

Step by Step Solution

1. Step 1: Write the proportion equation
   91,334 : 200,128 = 200,128 : x
2. Step 2: Convert to fraction form
   91,334/200,128 = 200,128/x
3. Step 3: Cross multiply
   91,334x = 200,128 × 200,128
4. Step 4: Simplify right side
   91,334x = 40,051,216,384
5. Step 5: Solve for x
   x = 40,051,216,384/91,334
6. Step 6: Final answer
   x = 438,513.77