Finding the Fourth Proportional to 10,218.22, 15,336.42 and 5,291.38

Step by Step Solution

1. Step 1: Write the proportion equation
   10,218.22 : 15,336.42 = 5,291.38 : x
2. Step 2: Convert to fraction form
   10,218.22/15,336.42 = 5,291.38/x
3. Step 3: Cross multiply
   10,218.22x = 15,336.42 × 5,291.38
4. Step 4: Simplify right side
   10,218.22x = 81,150,826.06
5. Step 5: Solve for x
   x = 81,150,826.06/10,218.22
6. Step 6: Final answer
   x = 7,941.78