Finding the Fourth Proportional to 22,786.45, 31,444.56 and 12,437.80

Step by Step Solution

1. Step 1: Write the proportion equation
   22,786.45 : 31,444.56 = 12,437.80 : x
2. Step 2: Convert to fraction form
   22,786.45/31,444.56 = 12,437.80/x
3. Step 3: Cross multiply
   22,786.45x = 31,444.56 × 12,437.80
4. Step 4: Simplify right side
   22,786.45x = 391,101,148.37
5. Step 5: Solve for x
   x = 391,101,148.37/22,786.45
6. Step 6: Final answer
   x = 17,163.76