Finding the Fourth Proportional to 21,434.88, 29,579.94 and 12,003.60

Step by Step Solution

1. Step 1: Write the proportion equation
   21,434.88 : 29,579.94 = 12,003.60 : x
2. Step 2: Convert to fraction form
   21,434.88/29,579.94 = 12,003.60/x
3. Step 3: Cross multiply
   21,434.88x = 29,579.94 × 12,003.60
4. Step 4: Simplify right side
   21,434.88x = 355,065,767.78
5. Step 5: Solve for x
   x = 355,065,767.78/21,434.88
6. Step 6: Final answer
   x = 16,564.86