Finding the Fourth Proportional to 22,585.06, 31,155.91 and 15,021.69

Step by Step Solution

1. Step 1: Write the proportion equation
   22,585.06 : 31,155.91 = 15,021.69 : x
2. Step 2: Convert to fraction form
   22,585.06/31,155.91 = 15,021.69/x
3. Step 3: Cross multiply
   22,585.06x = 31,155.91 × 15,021.69
4. Step 4: Simplify right side
   22,585.06x = 468,014,421.69
5. Step 5: Solve for x
   x = 468,014,421.69/22,585.06
6. Step 6: Final answer
   x = 20,722.30