Finding the Fourth Proportional to 1,908.10, 2,858.10 and 1,665.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,908.10 : 2,858.10 = 1,665.10 : x
2. Step 2: Convert to fraction form
   1,908.10/2,858.10 = 1,665.10/x
3. Step 3: Cross multiply
   1,908.10x = 2,858.10 × 1,665.10
4. Step 4: Simplify right side
   1,908.10x = 4,759,022.31
5. Step 5: Solve for x
   x = 4,759,022.31/1,908.10
6. Step 6: Final answer
   x = 2,494.12