Finding the Fourth Proportional to 7,399.68, 11,086.72 and 3,926.40

Step by Step Solution

1. Step 1: Write the proportion equation
   7,399.68 : 11,086.72 = 3,926.40 : x
2. Step 2: Convert to fraction form
   7,399.68/11,086.72 = 3,926.40/x
3. Step 3: Cross multiply
   7,399.68x = 11,086.72 × 3,926.40
4. Step 4: Simplify right side
   7,399.68x = 43,530,897.41
5. Step 5: Solve for x
   x = 43,530,897.41/7,399.68
6. Step 6: Final answer
   x = 5,882.81