Finding the Fourth Proportional to 15,849.75, 21,873.05 and 8,776.42

Step by Step Solution

1. Step 1: Write the proportion equation
   15,849.75 : 21,873.05 = 8,776.42 : x
2. Step 2: Convert to fraction form
   15,849.75/21,873.05 = 8,776.42/x
3. Step 3: Cross multiply
   15,849.75x = 21,873.05 × 8,776.42
4. Step 4: Simplify right side
   15,849.75x = 191,967,073.48
5. Step 5: Solve for x
   x = 191,967,073.48/15,849.75
6. Step 6: Final answer
   x = 12,111.68