Finding the Fourth Proportional to 14,259.56, 21,390.42 and 3,872.12

Step by Step Solution

1. Step 1: Write the proportion equation
   14,259.56 : 21,390.42 = 3,872.12 : x
2. Step 2: Convert to fraction form
   14,259.56/21,390.42 = 3,872.12/x
3. Step 3: Cross multiply
   14,259.56x = 21,390.42 × 3,872.12
4. Step 4: Simplify right side
   14,259.56x = 82,826,273.09
5. Step 5: Solve for x
   x = 82,826,273.09/14,259.56
6. Step 6: Final answer
   x = 5,808.47