Finding the Fourth Proportional to 21,667.13, 29,900.83 and 12,714.77

Step by Step Solution

1. Step 1: Write the proportion equation
   21,667.13 : 29,900.83 = 12,714.77 : x
2. Step 2: Convert to fraction form
   21,667.13/29,900.83 = 12,714.77/x
3. Step 3: Cross multiply
   21,667.13x = 29,900.83 × 12,714.77
4. Step 4: Simplify right side
   21,667.13x = 380,182,219.22
5. Step 5: Solve for x
   x = 380,182,219.22/21,667.13
6. Step 6: Final answer
   x = 17,546.50