Finding the Fourth Proportional to 21,131.04, 29,134.37 and 13,564.02

Step by Step Solution

1. Step 1: Write the proportion equation
   21,131.04 : 29,134.37 = 13,564.02 : x
2. Step 2: Convert to fraction form
   21,131.04/29,134.37 = 13,564.02/x
3. Step 3: Cross multiply
   21,131.04x = 29,134.37 × 13,564.02
4. Step 4: Simplify right side
   21,131.04x = 395,179,109.55
5. Step 5: Solve for x
   x = 395,179,109.55/21,131.04
6. Step 6: Final answer
   x = 18,701.36