Finding the Fourth Proportional to 21,083.86, 29,112.50 and 13,029.22

Step by Step Solution

1. Step 1: Write the proportion equation
   21,083.86 : 29,112.50 = 13,029.22 : x
2. Step 2: Convert to fraction form
   21,083.86/29,112.50 = 13,029.22/x
3. Step 3: Cross multiply
   21,083.86x = 29,112.50 × 13,029.22
4. Step 4: Simplify right side
   21,083.86x = 379,313,162.92
5. Step 5: Solve for x
   x = 379,313,162.92/21,083.86
6. Step 6: Final answer
   x = 17,990.69