Finding the Third Proportional to 4,153.78 and 9,089.72

Step by Step Solution

1. Step 1: Write the proportion equation
   4,153.78 : 9,089.72 = 9,089.72 : x
2. Step 2: Convert to fraction form
   4,153.78/9,089.72 = 9,089.72/x
3. Step 3: Cross multiply
   4,153.78x = 9,089.72 × 9,089.72
4. Step 4: Simplify right side
   4,153.78x = 82,622,986.95
5. Step 5: Solve for x
   x = 82,622,986.95/4,153.78
6. Step 6: Final answer
   x = 19,891.03