Finding the Fourth Proportional to 2,103.80, 2,789.03 and 2,103.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,103.80 : 2,789.03 = 2,103.80 : x
2. Step 2: Convert to fraction form
   2,103.80/2,789.03 = 2,103.80/x
3. Step 3: Cross multiply
   2,103.80x = 2,789.03 × 2,103.80
4. Step 4: Simplify right side
   2,103.80x = 5,867,561.31
5. Step 5: Solve for x
   x = 5,867,561.31/2,103.80
6. Step 6: Final answer
   x = 2,789.03