Finding the Fourth Proportional to 21,939.51, 30,280.46 and 12,382.32

Step by Step Solution

1. Step 1: Write the proportion equation
   21,939.51 : 30,280.46 = 12,382.32 : x
2. Step 2: Convert to fraction form
   21,939.51/30,280.46 = 12,382.32/x
3. Step 3: Cross multiply
   21,939.51x = 30,280.46 × 12,382.32
4. Step 4: Simplify right side
   21,939.51x = 374,942,261.61
5. Step 5: Solve for x
   x = 374,942,261.61/21,939.51
6. Step 6: Final answer
   x = 17,089.82