Finding the Fourth Proportional to 9,161.36, 12,642.72 and 5,182.38

Step by Step Solution

1. Step 1: Write the proportion equation
   9,161.36 : 12,642.72 = 5,182.38 : x
2. Step 2: Convert to fraction form
   9,161.36/12,642.72 = 5,182.38/x
3. Step 3: Cross multiply
   9,161.36x = 12,642.72 × 5,182.38
4. Step 4: Simplify right side
   9,161.36x = 65,519,435.04
5. Step 5: Solve for x
   x = 65,519,435.04/9,161.36
6. Step 6: Final answer
   x = 7,151.72