Finding the Fourth Proportional to 15,843.06, 21,856.60 and 9,124.69

Step by Step Solution

1. Step 1: Write the proportion equation
   15,843.06 : 21,856.60 = 9,124.69 : x
2. Step 2: Convert to fraction form
   15,843.06/21,856.60 = 9,124.69/x
3. Step 3: Cross multiply
   15,843.06x = 21,856.60 × 9,124.69
4. Step 4: Simplify right side
   15,843.06x = 199,434,653.83
5. Step 5: Solve for x
   x = 199,434,653.83/15,843.06
6. Step 6: Final answer
   x = 12,588.14