Finding the Fourth Proportional to 4,903.20, 7,355.94 and 1,440.72

Step by Step Solution

1. Step 1: Write the proportion equation
   4,903.20 : 7,355.94 = 1,440.72 : x
2. Step 2: Convert to fraction form
   4,903.20/7,355.94 = 1,440.72/x
3. Step 3: Cross multiply
   4,903.20x = 7,355.94 × 1,440.72
4. Step 4: Simplify right side
   4,903.20x = 10,597,849.88
5. Step 5: Solve for x
   x = 10,597,849.88/4,903.20
6. Step 6: Final answer
   x = 2,161.41