Finding the Fourth Proportional to 21,081.08, 29,097.96 and 13,916.23

Step by Step Solution

1. Step 1: Write the proportion equation
   21,081.08 : 29,097.96 = 13,916.23 : x
2. Step 2: Convert to fraction form
   21,081.08/29,097.96 = 13,916.23/x
3. Step 3: Cross multiply
   21,081.08x = 29,097.96 × 13,916.23
4. Step 4: Simplify right side
   21,081.08x = 404,933,903.89
5. Step 5: Solve for x
   x = 404,933,903.89/21,081.08
6. Step 6: Final answer
   x = 19,208.40