Finding the Fourth Proportional to 2,628.56, 3,945.24 and 1,330.92

Step by Step Solution

1. Step 1: Write the proportion equation
   2,628.56 : 3,945.24 = 1,330.92 : x
2. Step 2: Convert to fraction form
   2,628.56/3,945.24 = 1,330.92/x
3. Step 3: Cross multiply
   2,628.56x = 3,945.24 × 1,330.92
4. Step 4: Simplify right side
   2,628.56x = 5,250,798.82
5. Step 5: Solve for x
   x = 5,250,798.82/2,628.56
6. Step 6: Final answer
   x = 1,997.60