Finding the Fourth Proportional to 7,040.37, 10,553.57 and 3,921.81

Step by Step Solution

1. Step 1: Write the proportion equation
   7,040.37 : 10,553.57 = 3,921.81 : x
2. Step 2: Convert to fraction form
   7,040.37/10,553.57 = 3,921.81/x
3. Step 3: Cross multiply
   7,040.37x = 10,553.57 × 3,921.81
4. Step 4: Simplify right side
   7,040.37x = 41,389,096.36
5. Step 5: Solve for x
   x = 41,389,096.36/7,040.37
6. Step 6: Final answer
   x = 5,878.82