Finding the Fourth Proportional to 9,141.59, 12,615.39 and 5,163.54

Step by Step Solution

1. Step 1: Write the proportion equation
   9,141.59 : 12,615.39 = 5,163.54 : x
2. Step 2: Convert to fraction form
   9,141.59/12,615.39 = 5,163.54/x
3. Step 3: Cross multiply
   9,141.59x = 12,615.39 × 5,163.54
4. Step 4: Simplify right side
   9,141.59x = 65,140,070.88
5. Step 5: Solve for x
   x = 65,140,070.88/9,141.59
6. Step 6: Final answer
   x = 7,125.69