Finding the Fourth Proportional to 21,754.84, 30,017.37 and 12,802.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,754.84 : 30,017.37 = 12,802.72 : x
2. Step 2: Convert to fraction form
   21,754.84/30,017.37 = 12,802.72/x
3. Step 3: Cross multiply
   21,754.84x = 30,017.37 × 12,802.72
4. Step 4: Simplify right side
   21,754.84x = 384,303,983.25
5. Step 5: Solve for x
   x = 384,303,983.25/21,754.84
6. Step 6: Final answer
   x = 17,665.22