Finding the Fourth Proportional to 2,308.37, 3,185.60 and 1,313.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.37 : 3,185.60 = 1,313.55 : x
2. Step 2: Convert to fraction form
   2,308.37/3,185.60 = 1,313.55/x
3. Step 3: Cross multiply
   2,308.37x = 3,185.60 × 1,313.55
4. Step 4: Simplify right side
   2,308.37x = 4,184,438.31
5. Step 5: Solve for x
   x = 4,184,438.31/2,308.37
6. Step 6: Final answer
   x = 1,812.73