Finding the Fourth Proportional to 10,681.56, 16,025.76 and 5,135.31

Step by Step Solution

1. Step 1: Write the proportion equation
   10,681.56 : 16,025.76 = 5,135.31 : x
2. Step 2: Convert to fraction form
   10,681.56/16,025.76 = 5,135.31/x
3. Step 3: Cross multiply
   10,681.56x = 16,025.76 × 5,135.31
4. Step 4: Simplify right side
   10,681.56x = 82,297,245.59
5. Step 5: Solve for x
   x = 82,297,245.59/10,681.56
6. Step 6: Final answer
   x = 7,704.61