Finding the Fourth Proportional to 21,684.07, 29,924.06 and 12,124.30

Step by Step Solution

1. Step 1: Write the proportion equation
   21,684.07 : 29,924.06 = 12,124.30 : x
2. Step 2: Convert to fraction form
   21,684.07/29,924.06 = 12,124.30/x
3. Step 3: Cross multiply
   21,684.07x = 29,924.06 × 12,124.30
4. Step 4: Simplify right side
   21,684.07x = 362,808,131.04
5. Step 5: Solve for x
   x = 362,808,131.04/21,684.07
6. Step 6: Final answer
   x = 16,731.56