Finding the Fourth Proportional to 22,632.39, 31,211 and 13,556.31

Step by Step Solution

1. Step 1: Write the proportion equation
   22,632.39 : 31,211 = 13,556.31 : x
2. Step 2: Convert to fraction form
   22,632.39/31,211 = 13,556.31/x
3. Step 3: Cross multiply
   22,632.39x = 31,211 × 13,556.31
4. Step 4: Simplify right side
   22,632.39x = 423,105,991.41
5. Step 5: Solve for x
   x = 423,105,991.41/22,632.39
6. Step 6: Final answer
   x = 18,694.71