Finding the Fourth Proportional to 10,913.73, 16,371.47 and 5,289.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,913.73 : 16,371.47 = 5,289.76 : x
2. Step 2: Convert to fraction form
   10,913.73/16,371.47 = 5,289.76/x
3. Step 3: Cross multiply
   10,913.73x = 16,371.47 × 5,289.76
4. Step 4: Simplify right side
   10,913.73x = 86,601,147.15
5. Step 5: Solve for x
   x = 86,601,147.15/10,913.73
6. Step 6: Final answer
   x = 7,935.06