Finding the Fourth Proportional to 17,221.78, 25,826.59 and 5,531.05

Step by Step Solution

1. Step 1: Write the proportion equation
   17,221.78 : 25,826.59 = 5,531.05 : x
2. Step 2: Convert to fraction form
   17,221.78/25,826.59 = 5,531.05/x
3. Step 3: Cross multiply
   17,221.78x = 25,826.59 × 5,531.05
4. Step 4: Simplify right side
   17,221.78x = 142,848,003.83
5. Step 5: Solve for x
   x = 142,848,003.83/17,221.78
6. Step 6: Final answer
   x = 8,294.62