Finding the Fourth Proportional to 2,663.28, 3,991.68 and 1,491.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,663.28 : 3,991.68 = 1,491.48 : x
2. Step 2: Convert to fraction form
   2,663.28/3,991.68 = 1,491.48/x
3. Step 3: Cross multiply
   2,663.28x = 3,991.68 × 1,491.48
4. Step 4: Simplify right side
   2,663.28x = 5,953,510.89
5. Step 5: Solve for x
   x = 5,953,510.89/2,663.28
6. Step 6: Final answer
   x = 2,235.41