Finding the Fourth Proportional to 10,828.40, 16,244.89 and 3,431.88

Step by Step Solution

1. Step 1: Write the proportion equation
   10,828.40 : 16,244.89 = 3,431.88 : x
2. Step 2: Convert to fraction form
   10,828.40/16,244.89 = 3,431.88/x
3. Step 3: Cross multiply
   10,828.40x = 16,244.89 × 3,431.88
4. Step 4: Simplify right side
   10,828.40x = 55,750,504.51
5. Step 5: Solve for x
   x = 55,750,504.51/10,828.40
6. Step 6: Final answer
   x = 5,148.55