Finding the Fourth Proportional to 22,128.48, 30,536.88 and 12,056.80

Step by Step Solution

1. Step 1: Write the proportion equation
   22,128.48 : 30,536.88 = 12,056.80 : x
2. Step 2: Convert to fraction form
   22,128.48/30,536.88 = 12,056.80/x
3. Step 3: Cross multiply
   22,128.48x = 30,536.88 × 12,056.80
4. Step 4: Simplify right side
   22,128.48x = 368,177,054.78
5. Step 5: Solve for x
   x = 368,177,054.78/22,128.48
6. Step 6: Final answer
   x = 16,638.15