Finding the Fourth Proportional to 17,105.63, 25,658.27 and 5,418.85

Step by Step Solution

1. Step 1: Write the proportion equation
   17,105.63 : 25,658.27 = 5,418.85 : x
2. Step 2: Convert to fraction form
   17,105.63/25,658.27 = 5,418.85/x
3. Step 3: Cross multiply
   17,105.63x = 25,658.27 × 5,418.85
4. Step 4: Simplify right side
   17,105.63x = 139,038,293.58
5. Step 5: Solve for x
   x = 139,038,293.58/17,105.63
6. Step 6: Final answer
   x = 8,128.22