Finding the Fourth Proportional to 2,308.71, 3,185.70 and 1,313.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.71 : 3,185.70 = 1,313.88 : x
2. Step 2: Convert to fraction form
   2,308.71/3,185.70 = 1,313.88/x
3. Step 3: Cross multiply
   2,308.71x = 3,185.70 × 1,313.88
4. Step 4: Simplify right side
   2,308.71x = 4,185,610.64
5. Step 5: Solve for x
   x = 4,185,610.64/2,308.71
6. Step 6: Final answer
   x = 1,812.96