Finding the Fourth Proportional to 10,846.73, 16,239.33 and 7,137.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,846.73 : 16,239.33 = 7,137.78 : x
2. Step 2: Convert to fraction form
   10,846.73/16,239.33 = 7,137.78/x
3. Step 3: Cross multiply
   10,846.73x = 16,239.33 × 7,137.78
4. Step 4: Simplify right side
   10,846.73x = 115,912,764.89
5. Step 5: Solve for x
   x = 115,912,764.89/10,846.73
6. Step 6: Final answer
   x = 10,686.43