Finding the Fourth Proportional to 10,833.31, 16,239.39 and 5,286.43

Step by Step Solution

1. Step 1: Write the proportion equation
   10,833.31 : 16,239.39 = 5,286.43 : x
2. Step 2: Convert to fraction form
   10,833.31/16,239.39 = 5,286.43/x
3. Step 3: Cross multiply
   10,833.31x = 16,239.39 × 5,286.43
4. Step 4: Simplify right side
   10,833.31x = 85,848,398.48
5. Step 5: Solve for x
   x = 85,848,398.48/10,833.31
6. Step 6: Final answer
   x = 7,924.48