Finding the Fourth Proportional to 21,097.56, 29,091.45 and 13,541.04

Step by Step Solution

1. Step 1: Write the proportion equation
   21,097.56 : 29,091.45 = 13,541.04 : x
2. Step 2: Convert to fraction form
   21,097.56/29,091.45 = 13,541.04/x
3. Step 3: Cross multiply
   21,097.56x = 29,091.45 × 13,541.04
4. Step 4: Simplify right side
   21,097.56x = 393,928,538.89
5. Step 5: Solve for x
   x = 393,928,538.89/21,097.56
6. Step 6: Final answer
   x = 18,671.75