Finding the Fourth Proportional to 21,589.34, 29,796.12 and 12,159.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,589.34 : 29,796.12 = 12,159.72 : x
2. Step 2: Convert to fraction form
   21,589.34/29,796.12 = 12,159.72/x
3. Step 3: Cross multiply
   21,589.34x = 29,796.12 × 12,159.72
4. Step 4: Simplify right side
   21,589.34x = 362,312,476.29
5. Step 5: Solve for x
   x = 362,312,476.29/21,589.34
6. Step 6: Final answer
   x = 16,782.01