Finding the Fourth Proportional to 10,443.78, 14,412.60 and 5,728.05

Step by Step Solution

1. Step 1: Write the proportion equation
   10,443.78 : 14,412.60 = 5,728.05 : x
2. Step 2: Convert to fraction form
   10,443.78/14,412.60 = 5,728.05/x
3. Step 3: Cross multiply
   10,443.78x = 14,412.60 × 5,728.05
4. Step 4: Simplify right side
   10,443.78x = 82,556,093.43
5. Step 5: Solve for x
   x = 82,556,093.43/10,443.78
6. Step 6: Final answer
   x = 7,904.81