Finding the Fourth Proportional to 21,111.48, 29,121.15 and 13,941.46

Step by Step Solution

1. Step 1: Write the proportion equation
   21,111.48 : 29,121.15 = 13,941.46 : x
2. Step 2: Convert to fraction form
   21,111.48/29,121.15 = 13,941.46/x
3. Step 3: Cross multiply
   21,111.48x = 29,121.15 × 13,941.46
4. Step 4: Simplify right side
   21,111.48x = 405,991,347.88
5. Step 5: Solve for x
   x = 405,991,347.88/21,111.48
6. Step 6: Final answer
   x = 19,230.83