Finding the Third Proportional to 91,096.88 and 200,128.69

Step by Step Solution

1. Step 1: Write the proportion equation
   91,096.88 : 200,128.69 = 200,128.69 : x
2. Step 2: Convert to fraction form
   91,096.88/200,128.69 = 200,128.69/x
3. Step 3: Cross multiply
   91,096.88x = 200,128.69 × 200,128.69
4. Step 4: Simplify right side
   91,096.88x = 40,051,491,560.47
5. Step 5: Solve for x
   x = 40,051,491,560.47/91,096.88
6. Step 6: Final answer
   x = 439,658.24