Finding the Fourth Proportional to 12,585.52, 18,870.18 and 10,831.06

Step by Step Solution

1. Step 1: Write the proportion equation
   12,585.52 : 18,870.18 = 10,831.06 : x
2. Step 2: Convert to fraction form
   12,585.52/18,870.18 = 10,831.06/x
3. Step 3: Cross multiply
   12,585.52x = 18,870.18 × 10,831.06
4. Step 4: Simplify right side
   12,585.52x = 204,384,051.79
5. Step 5: Solve for x
   x = 204,384,051.79/12,585.52
6. Step 6: Final answer
   x = 16,239.62