Finding the Fourth Proportional to 21,588.42, 29,791.89 and 12,160.02

Step by Step Solution

1. Step 1: Write the proportion equation
   21,588.42 : 29,791.89 = 12,160.02 : x
2. Step 2: Convert to fraction form
   21,588.42/29,791.89 = 12,160.02/x
3. Step 3: Cross multiply
   21,588.42x = 29,791.89 × 12,160.02
4. Step 4: Simplify right side
   21,588.42x = 362,269,978.24
5. Step 5: Solve for x
   x = 362,269,978.24/21,588.42
6. Step 6: Final answer
   x = 16,780.75