Finding the Fourth Proportional to 17,738.71, 26,610.78 and 5,257.42

Step by Step Solution

1. Step 1: Write the proportion equation
   17,738.71 : 26,610.78 = 5,257.42 : x
2. Step 2: Convert to fraction form
   17,738.71/26,610.78 = 5,257.42/x
3. Step 3: Cross multiply
   17,738.71x = 26,610.78 × 5,257.42
4. Step 4: Simplify right side
   17,738.71x = 139,904,046.99
5. Step 5: Solve for x
   x = 139,904,046.99/17,738.71
6. Step 6: Final answer
   x = 7,886.93