Finding the Fourth Proportional to 22,559.06, 31,131.06 and 12,487.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,559.06 : 31,131.06 = 12,487.50 : x
2. Step 2: Convert to fraction form
   22,559.06/31,131.06 = 12,487.50/x
3. Step 3: Cross multiply
   22,559.06x = 31,131.06 × 12,487.50
4. Step 4: Simplify right side
   22,559.06x = 388,749,064.92
5. Step 5: Solve for x
   x = 388,749,064.92/22,559.06
6. Step 6: Final answer
   x = 17,232.50