Finding the Fourth Proportional to 21,253.50, 31,866.58 and 8,098.69

Step by Step Solution

1. Step 1: Write the proportion equation
   21,253.50 : 31,866.58 = 8,098.69 : x
2. Step 2: Convert to fraction form
   21,253.50/31,866.58 = 8,098.69/x
3. Step 3: Cross multiply
   21,253.50x = 31,866.58 × 8,098.69
4. Step 4: Simplify right side
   21,253.50x = 258,077,552.78
5. Step 5: Solve for x
   x = 258,077,552.78/21,253.50
6. Step 6: Final answer
   x = 12,142.83