Finding the Fourth Proportional to 21,535.07, 29,721.06 and 12,103.63

Step by Step Solution

1. Step 1: Write the proportion equation
   21,535.07 : 29,721.06 = 12,103.63 : x
2. Step 2: Convert to fraction form
   21,535.07/29,721.06 = 12,103.63/x
3. Step 3: Cross multiply
   21,535.07x = 29,721.06 × 12,103.63
4. Step 4: Simplify right side
   21,535.07x = 359,732,639.15
5. Step 5: Solve for x
   x = 359,732,639.15/21,535.07
6. Step 6: Final answer
   x = 16,704.51