Finding the Fourth Proportional to 9,143.94, 12,618.57 and 5,164.98

Step by Step Solution

1. Step 1: Write the proportion equation
   9,143.94 : 12,618.57 = 5,164.98 : x
2. Step 2: Convert to fraction form
   9,143.94/12,618.57 = 5,164.98/x
3. Step 3: Cross multiply
   9,143.94x = 12,618.57 × 5,164.98
4. Step 4: Simplify right side
   9,143.94x = 65,174,661.68
5. Step 5: Solve for x
   x = 65,174,661.68/9,143.94
6. Step 6: Final answer
   x = 7,127.63