Finding the Fourth Proportional to 10,447.59, 15,661.40 and 3,872.01

Step by Step Solution

1. Step 1: Write the proportion equation
   10,447.59 : 15,661.40 = 3,872.01 : x
2. Step 2: Convert to fraction form
   10,447.59/15,661.40 = 3,872.01/x
3. Step 3: Cross multiply
   10,447.59x = 15,661.40 × 3,872.01
4. Step 4: Simplify right side
   10,447.59x = 60,641,078.05
5. Step 5: Solve for x
   x = 60,641,078.05/10,447.59
6. Step 6: Final answer
   x = 5,804.31