Finding the Fourth Proportional to 22,549.46, 31,121.55 and 12,987.48

Step by Step Solution

1. Step 1: Write the proportion equation
   22,549.46 : 31,121.55 = 12,987.48 : x
2. Step 2: Convert to fraction form
   22,549.46/31,121.55 = 12,987.48/x
3. Step 3: Cross multiply
   22,549.46x = 31,121.55 × 12,987.48
4. Step 4: Simplify right side
   22,549.46x = 404,190,673.60
5. Step 5: Solve for x
   x = 404,190,673.60/22,549.46
6. Step 6: Final answer
   x = 17,924.63