Finding the Fourth Proportional to 21,053.52, 31,552.94 and 8,559

Step by Step Solution

1. Step 1: Write the proportion equation
   21,053.52 : 31,552.94 = 8,559 : x
2. Step 2: Convert to fraction form
   21,053.52/31,552.94 = 8,559/x
3. Step 3: Cross multiply
   21,053.52x = 31,552.94 × 8,559
4. Step 4: Simplify right side
   21,053.52x = 270,061,613.46
5. Step 5: Solve for x
   x = 270,061,613.46/21,053.52
6. Step 6: Final answer
   x = 12,827.39