Finding the Fourth Proportional to 10,456.52, 15,676.41 and 5,456.39

Step by Step Solution

1. Step 1: Write the proportion equation
   10,456.52 : 15,676.41 = 5,456.39 : x
2. Step 2: Convert to fraction form
   10,456.52/15,676.41 = 5,456.39/x
3. Step 3: Cross multiply
   10,456.52x = 15,676.41 × 5,456.39
4. Step 4: Simplify right side
   10,456.52x = 85,536,528.38
5. Step 5: Solve for x
   x = 85,536,528.38/10,456.52
6. Step 6: Final answer
   x = 8,180.21