Finding the Fourth Proportional to 21,714.56, 29,967.53 and 12,155.34

Step by Step Solution

1. Step 1: Write the proportion equation
   21,714.56 : 29,967.53 = 12,155.34 : x
2. Step 2: Convert to fraction form
   21,714.56/29,967.53 = 12,155.34/x
3. Step 3: Cross multiply
   21,714.56x = 29,967.53 × 12,155.34
4. Step 4: Simplify right side
   21,714.56x = 364,265,516.11
5. Step 5: Solve for x
   x = 364,265,516.11/21,714.56
6. Step 6: Final answer
   x = 16,775.17