Finding the Fourth Proportional to 21,737.39, 29,995.72 and 12,661.34

Step by Step Solution

1. Step 1: Write the proportion equation
   21,737.39 : 29,995.72 = 12,661.34 : x
2. Step 2: Convert to fraction form
   21,737.39/29,995.72 = 12,661.34/x
3. Step 3: Cross multiply
   21,737.39x = 29,995.72 × 12,661.34
4. Step 4: Simplify right side
   21,737.39x = 379,785,827.83
5. Step 5: Solve for x
   x = 379,785,827.83/21,737.39
6. Step 6: Final answer
   x = 17,471.55