Finding the Fourth Proportional to 2,505.39, 3,457.41 and 1,386.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,505.39 : 3,457.41 = 1,386.42 : x
2. Step 2: Convert to fraction form
   2,505.39/3,457.41 = 1,386.42/x
3. Step 3: Cross multiply
   2,505.39x = 3,457.41 × 1,386.42
4. Step 4: Simplify right side
   2,505.39x = 4,793,422.37
5. Step 5: Solve for x
   x = 4,793,422.37/2,505.39
6. Step 6: Final answer
   x = 1,913.24