Finding the Fourth Proportional to 21,087.18, 29,097.81 and 11,654.10

Step by Step Solution

1. Step 1: Write the proportion equation
   21,087.18 : 29,097.81 = 11,654.10 : x
2. Step 2: Convert to fraction form
   21,087.18/29,097.81 = 11,654.10/x
3. Step 3: Cross multiply
   21,087.18x = 29,097.81 × 11,654.10
4. Step 4: Simplify right side
   21,087.18x = 339,108,787.52
5. Step 5: Solve for x
   x = 339,108,787.52/21,087.18
6. Step 6: Final answer
   x = 16,081.28