Finding the Fourth Proportional to 21,288.83, 29,383.56 and 12,341.30

Step by Step Solution

1. Step 1: Write the proportion equation
   21,288.83 : 29,383.56 = 12,341.30 : x
2. Step 2: Convert to fraction form
   21,288.83/29,383.56 = 12,341.30/x
3. Step 3: Cross multiply
   21,288.83x = 29,383.56 × 12,341.30
4. Step 4: Simplify right side
   21,288.83x = 362,631,182.11
5. Step 5: Solve for x
   x = 362,631,182.11/21,288.83
6. Step 6: Final answer
   x = 17,033.87