Finding the Fourth Proportional to 9,143.37, 12,618.05 and 5,164.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,143.37 : 12,618.05 = 5,164.25 : x
2. Step 2: Convert to fraction form
   9,143.37/12,618.05 = 5,164.25/x
3. Step 3: Cross multiply
   9,143.37x = 12,618.05 × 5,164.25
4. Step 4: Simplify right side
   9,143.37x = 65,162,675.80
5. Step 5: Solve for x
   x = 65,162,675.80/9,143.37
6. Step 6: Final answer
   x = 7,126.77