Finding the Fourth Proportional to 21,544.84, 29,721.90 and 12,592.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,544.84 : 29,721.90 = 12,592.72 : x
2. Step 2: Convert to fraction form
   21,544.84/29,721.90 = 12,592.72/x
3. Step 3: Cross multiply
   21,544.84x = 29,721.90 × 12,592.72
4. Step 4: Simplify right side
   21,544.84x = 374,279,564.57
5. Step 5: Solve for x
   x = 374,279,564.57/21,544.84
6. Step 6: Final answer
   x = 17,372.12