Finding the Fourth Proportional to 2,308.59, 3,185.91 and 1,313.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.59 : 3,185.91 = 1,313.98 : x
2. Step 2: Convert to fraction form
   2,308.59/3,185.91 = 1,313.98/x
3. Step 3: Cross multiply
   2,308.59x = 3,185.91 × 1,313.98
4. Step 4: Simplify right side
   2,308.59x = 4,186,214.06
5. Step 5: Solve for x
   x = 4,186,214.06/2,308.59
6. Step 6: Final answer
   x = 1,813.32