Finding the Fourth Proportional to 2,308.78, 3,464.38 and 1,386.19

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.78 : 3,464.38 = 1,386.19 : x
2. Step 2: Convert to fraction form
   2,308.78/3,464.38 = 1,386.19/x
3. Step 3: Cross multiply
   2,308.78x = 3,464.38 × 1,386.19
4. Step 4: Simplify right side
   2,308.78x = 4,802,288.91
5. Step 5: Solve for x
   x = 4,802,288.91/2,308.78
6. Step 6: Final answer
   x = 2,080.01