Finding the Fourth Proportional to 15,867.59, 21,898.82 and 8,795.75

Step by Step Solution

1. Step 1: Write the proportion equation
   15,867.59 : 21,898.82 = 8,795.75 : x
2. Step 2: Convert to fraction form
   15,867.59/21,898.82 = 8,795.75/x
3. Step 3: Cross multiply
   15,867.59x = 21,898.82 × 8,795.75
4. Step 4: Simplify right side
   15,867.59x = 192,616,556.78
5. Step 5: Solve for x
   x = 192,616,556.78/15,867.59
6. Step 6: Final answer
   x = 12,138.99