Finding the Fourth Proportional to 2,308.31, 3,185.04 and 1,313.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.31 : 3,185.04 = 1,313.53 : x
2. Step 2: Convert to fraction form
   2,308.31/3,185.04 = 1,313.53/x
3. Step 3: Cross multiply
   2,308.31x = 3,185.04 × 1,313.53
4. Step 4: Simplify right side
   2,308.31x = 4,183,645.59
5. Step 5: Solve for x
   x = 4,183,645.59/2,308.31
6. Step 6: Final answer
   x = 1,812.43