Finding the Fourth Proportional to 14,109.05, 21,161.41 and 3,721.61

Step by Step Solution

1. Step 1: Write the proportion equation
   14,109.05 : 21,161.41 = 3,721.61 : x
2. Step 2: Convert to fraction form
   14,109.05/21,161.41 = 3,721.61/x
3. Step 3: Cross multiply
   14,109.05x = 21,161.41 × 3,721.61
4. Step 4: Simplify right side
   14,109.05x = 78,754,515.07
5. Step 5: Solve for x
   x = 78,754,515.07/14,109.05
6. Step 6: Final answer
   x = 5,581.84