Finding the Fourth Proportional to 21,730.96, 29,983.57 and 12,299.52

Step by Step Solution

1. Step 1: Write the proportion equation
   21,730.96 : 29,983.57 = 12,299.52 : x
2. Step 2: Convert to fraction form
   21,730.96/29,983.57 = 12,299.52/x
3. Step 3: Cross multiply
   21,730.96x = 29,983.57 × 12,299.52
4. Step 4: Simplify right side
   21,730.96x = 368,783,518.89
5. Step 5: Solve for x
   x = 368,783,518.89/21,730.96
6. Step 6: Final answer
   x = 16,970.42