Finding the Fourth Proportional to 2,308.68, 3,185.61 and 1,313.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.68 : 3,185.61 = 1,313.58 : x
2. Step 2: Convert to fraction form
   2,308.68/3,185.61 = 1,313.58/x
3. Step 3: Cross multiply
   2,308.68x = 3,185.61 × 1,313.58
4. Step 4: Simplify right side
   2,308.68x = 4,184,553.58
5. Step 5: Solve for x
   x = 4,184,553.58/2,308.68
6. Step 6: Final answer
   x = 1,812.53