Finding the Fourth Proportional to 22,256.78, 30,714.72 and 12,185.05

Step by Step Solution

1. Step 1: Write the proportion equation
   22,256.78 : 30,714.72 = 12,185.05 : x
2. Step 2: Convert to fraction form
   22,256.78/30,714.72 = 12,185.05/x
3. Step 3: Cross multiply
   22,256.78x = 30,714.72 × 12,185.05
4. Step 4: Simplify right side
   22,256.78x = 374,260,475.72
5. Step 5: Solve for x
   x = 374,260,475.72/22,256.78
6. Step 6: Final answer
   x = 16,815.57