Finding the Fourth Proportional to 9,141.36, 12,615.57 and 5,162.64

Step by Step Solution

1. Step 1: Write the proportion equation
   9,141.36 : 12,615.57 = 5,162.64 : x
2. Step 2: Convert to fraction form
   9,141.36/12,615.57 = 5,162.64/x
3. Step 3: Cross multiply
   9,141.36x = 12,615.57 × 5,162.64
4. Step 4: Simplify right side
   9,141.36x = 65,129,646.30
5. Step 5: Solve for x
   x = 65,129,646.30/9,141.36
6. Step 6: Final answer
   x = 7,124.72