Finding the Fourth Proportional to 10,141.20, 13,983.12 and 7,440.12

Step by Step Solution

1. Step 1: Write the proportion equation
   10,141.20 : 13,983.12 = 7,440.12 : x
2. Step 2: Convert to fraction form
   10,141.20/13,983.12 = 7,440.12/x
3. Step 3: Cross multiply
   10,141.20x = 13,983.12 × 7,440.12
4. Step 4: Simplify right side
   10,141.20x = 104,036,090.77
5. Step 5: Solve for x
   x = 104,036,090.77/10,141.20
6. Step 6: Final answer
   x = 10,258.76