Finding the Fourth Proportional to 5,151.98, 7,728.46 and 1,403.81

Step by Step Solution

1. Step 1: Write the proportion equation
   5,151.98 : 7,728.46 = 1,403.81 : x
2. Step 2: Convert to fraction form
   5,151.98/7,728.46 = 1,403.81/x
3. Step 3: Cross multiply
   5,151.98x = 7,728.46 × 1,403.81
4. Step 4: Simplify right side
   5,151.98x = 10,849,289.43
5. Step 5: Solve for x
   x = 10,849,289.43/5,151.98
6. Step 6: Final answer
   x = 2,105.85