Finding the Fourth Proportional to 21,111.22, 29,120.80 and 13,941.22

Step by Step Solution

1. Step 1: Write the proportion equation
   21,111.22 : 29,120.80 = 13,941.22 : x
2. Step 2: Convert to fraction form
   21,111.22/29,120.80 = 13,941.22/x
3. Step 3: Cross multiply
   21,111.22x = 29,120.80 × 13,941.22
4. Step 4: Simplify right side
   21,111.22x = 405,979,479.38
5. Step 5: Solve for x
   x = 405,979,479.38/21,111.22
6. Step 6: Final answer
   x = 19,230.51