Finding the Fourth Proportional to 21,106.73, 29,114.60 and 13,936.71

Step by Step Solution

1. Step 1: Write the proportion equation
   21,106.73 : 29,114.60 = 13,936.71 : x
2. Step 2: Convert to fraction form
   21,106.73/29,114.60 = 13,936.71/x
3. Step 3: Cross multiply
   21,106.73x = 29,114.60 × 13,936.71
4. Step 4: Simplify right side
   21,106.73x = 405,761,667.28
5. Step 5: Solve for x
   x = 405,761,667.28/21,106.73
6. Step 6: Final answer
   x = 19,224.28