Finding the Fourth Proportional to 1,789.16, 2,469.96 and 1,389.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,789.16 : 2,469.96 = 1,389.93 : x
2. Step 2: Convert to fraction form
   1,789.16/2,469.96 = 1,389.93/x
3. Step 3: Cross multiply
   1,789.16x = 2,469.96 × 1,389.93
4. Step 4: Simplify right side
   1,789.16x = 3,433,067.45
5. Step 5: Solve for x
   x = 3,433,067.45/1,789.16
6. Step 6: Final answer
   x = 1,918.82