Finding the Fourth Proportional to 10,724.81, 15,996.79 and 10,396.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,724.81 : 15,996.79 = 10,396.76 : x
2. Step 2: Convert to fraction form
   10,724.81/15,996.79 = 10,396.76/x
3. Step 3: Cross multiply
   10,724.81x = 15,996.79 × 10,396.76
4. Step 4: Simplify right side
   10,724.81x = 166,314,719.41
5. Step 5: Solve for x
   x = 166,314,719.41/10,724.81
6. Step 6: Final answer
   x = 15,507.48