Finding the Fourth Proportional to 21,210.26, 31,819.49 and 8,061.61

Step by Step Solution

1. Step 1: Write the proportion equation
   21,210.26 : 31,819.49 = 8,061.61 : x
2. Step 2: Convert to fraction form
   21,210.26/31,819.49 = 8,061.61/x
3. Step 3: Cross multiply
   21,210.26x = 31,819.49 × 8,061.61
4. Step 4: Simplify right side
   21,210.26x = 256,516,318.78
5. Step 5: Solve for x
   x = 256,516,318.78/21,210.26
6. Step 6: Final answer
   x = 12,093.97