Finding the Fourth Proportional to 22,544.74, 31,112.88 and 12,986.08

Step by Step Solution

1. Step 1: Write the proportion equation
   22,544.74 : 31,112.88 = 12,986.08 : x
2. Step 2: Convert to fraction form
   22,544.74/31,112.88 = 12,986.08/x
3. Step 3: Cross multiply
   22,544.74x = 31,112.88 × 12,986.08
4. Step 4: Simplify right side
   22,544.74x = 404,034,348.71
5. Step 5: Solve for x
   x = 404,034,348.71/22,544.74
6. Step 6: Final answer
   x = 17,921.45