Finding the Fourth Proportional to 22,380, 30,884.40 and 12,444

Step by Step Solution

1. Step 1: Write the proportion equation
   22,380 : 30,884.40 = 12,444 : x
2. Step 2: Convert to fraction form
   22,380/30,884.40 = 12,444/x
3. Step 3: Cross multiply
   22,380x = 30,884.40 × 12,444
4. Step 4: Simplify right side
   22,380x = 384,325,473.60
5. Step 5: Solve for x
   x = 384,325,473.60/22,380
6. Step 6: Final answer
   x = 17,172.72