Finding the Fourth Proportional to 9,143.38, 12,618.21 and 5,164.93

Step by Step Solution

1. Step 1: Write the proportion equation
   9,143.38 : 12,618.21 = 5,164.93 : x
2. Step 2: Convert to fraction form
   9,143.38/12,618.21 = 5,164.93/x
3. Step 3: Cross multiply
   9,143.38x = 12,618.21 × 5,164.93
4. Step 4: Simplify right side
   9,143.38x = 65,172,171.38
5. Step 5: Solve for x
   x = 65,172,171.38/9,143.38
6. Step 6: Final answer
   x = 7,127.80