Finding the Fourth Proportional to 22,559.67, 31,131.97 and 12,487.90

Step by Step Solution

1. Step 1: Write the proportion equation
   22,559.67 : 31,131.97 = 12,487.90 : x
2. Step 2: Convert to fraction form
   22,559.67/31,131.97 = 12,487.90/x
3. Step 3: Cross multiply
   22,559.67x = 31,131.97 × 12,487.90
4. Step 4: Simplify right side
   22,559.67x = 388,772,928.16
5. Step 5: Solve for x
   x = 388,772,928.16/22,559.67
6. Step 6: Final answer
   x = 17,233.09