Finding the Fourth Proportional to 1,810.11, 2,496.82 and 1,389.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,810.11 : 2,496.82 = 1,389.83 : x
2. Step 2: Convert to fraction form
   1,810.11/2,496.82 = 1,389.83/x
3. Step 3: Cross multiply
   1,810.11x = 2,496.82 × 1,389.83
4. Step 4: Simplify right side
   1,810.11x = 3,470,135.91
5. Step 5: Solve for x
   x = 3,470,135.91/1,810.11
6. Step 6: Final answer
   x = 1,917.09