Finding the Fourth Proportional to 17,818.24, 26,709.76 and 8,590.72

Step by Step Solution

1. Step 1: Write the proportion equation
   17,818.24 : 26,709.76 = 8,590.72 : x
2. Step 2: Convert to fraction form
   17,818.24/26,709.76 = 8,590.72/x
3. Step 3: Cross multiply
   17,818.24x = 26,709.76 × 8,590.72
4. Step 4: Simplify right side
   17,818.24x = 229,456,069.43
5. Step 5: Solve for x
   x = 229,456,069.43/17,818.24
6. Step 6: Final answer
   x = 12,877.59