Finding the Fourth Proportional to 21,085.93, 29,100.09 and 11,654.29

Step by Step Solution

1. Step 1: Write the proportion equation
   21,085.93 : 29,100.09 = 11,654.29 : x
2. Step 2: Convert to fraction form
   21,085.93/29,100.09 = 11,654.29/x
3. Step 3: Cross multiply
   21,085.93x = 29,100.09 × 11,654.29
4. Step 4: Simplify right side
   21,085.93x = 339,140,887.89
5. Step 5: Solve for x
   x = 339,140,887.89/21,085.93
6. Step 6: Final answer
   x = 16,083.75