Finding the Fourth Proportional to 1,928.69, 2,660.39 and 1,424.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,928.69 : 2,660.39 = 1,424.03 : x
2. Step 2: Convert to fraction form
   1,928.69/2,660.39 = 1,424.03/x
3. Step 3: Cross multiply
   1,928.69x = 2,660.39 × 1,424.03
4. Step 4: Simplify right side
   1,928.69x = 3,788,475.17
5. Step 5: Solve for x
   x = 3,788,475.17/1,928.69
6. Step 6: Final answer
   x = 1,964.27