Finding the Fourth Proportional to 1,928.58, 2,659.96 and 1,399.46

Step by Step Solution

1. Step 1: Write the proportion equation
   1,928.58 : 2,659.96 = 1,399.46 : x
2. Step 2: Convert to fraction form
   1,928.58/2,659.96 = 1,399.46/x
3. Step 3: Cross multiply
   1,928.58x = 2,659.96 × 1,399.46
4. Step 4: Simplify right side
   1,928.58x = 3,722,507.62
5. Step 5: Solve for x
   x = 3,722,507.62/1,928.58
6. Step 6: Final answer
   x = 1,930.18