Finding the Fourth Proportional to 2,457.11, 3,390.83 and 1,338.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,457.11 : 3,390.83 = 1,338.05 : x
2. Step 2: Convert to fraction form
   2,457.11/3,390.83 = 1,338.05/x
3. Step 3: Cross multiply
   2,457.11x = 3,390.83 × 1,338.05
4. Step 4: Simplify right side
   2,457.11x = 4,537,106.89
5. Step 5: Solve for x
   x = 4,537,106.89/2,457.11
6. Step 6: Final answer
   x = 1,846.52