Finding the Fourth Proportional to 22,157.78, 30,577.71 and 12,221.78

Step by Step Solution

1. Step 1: Write the proportion equation
   22,157.78 : 30,577.71 = 12,221.78 : x
2. Step 2: Convert to fraction form
   22,157.78/30,577.71 = 12,221.78/x
3. Step 3: Cross multiply
   22,157.78x = 30,577.71 × 12,221.78
4. Step 4: Simplify right side
   22,157.78x = 373,714,044.52
5. Step 5: Solve for x
   x = 373,714,044.52/22,157.78
6. Step 6: Final answer
   x = 16,866.04