Finding the Fourth Proportional to 2,457.09, 3,390.67 and 1,338.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,457.09 : 3,390.67 = 1,338.02 : x
2. Step 2: Convert to fraction form
   2,457.09/3,390.67 = 1,338.02/x
3. Step 3: Cross multiply
   2,457.09x = 3,390.67 × 1,338.02
4. Step 4: Simplify right side
   2,457.09x = 4,536,784.27
5. Step 5: Solve for x
   x = 4,536,784.27/2,457.09
6. Step 6: Final answer
   x = 1,846.41