Finding the Fourth Proportional to 1,928.59, 2,656.93 and 1,338.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,928.59 : 2,656.93 = 1,338.10 : x
2. Step 2: Convert to fraction form
   1,928.59/2,656.93 = 1,338.10/x
3. Step 3: Cross multiply
   1,928.59x = 2,656.93 × 1,338.10
4. Step 4: Simplify right side
   1,928.59x = 3,555,238.03
5. Step 5: Solve for x
   x = 3,555,238.03/1,928.59
6. Step 6: Final answer
   x = 1,843.44