Finding the Fourth Proportional to 15,581.69, 21,499.83 and 8,866.91

Step by Step Solution

1. Step 1: Write the proportion equation
   15,581.69 : 21,499.83 = 8,866.91 : x
2. Step 2: Convert to fraction form
   15,581.69/21,499.83 = 8,866.91/x
3. Step 3: Cross multiply
   15,581.69x = 21,499.83 × 8,866.91
4. Step 4: Simplify right side
   15,581.69x = 190,637,111.37
5. Step 5: Solve for x
   x = 190,637,111.37/15,581.69
6. Step 6: Final answer
   x = 12,234.69