Finding the Fourth Proportional to 1,393.59, 2,081.56 and 1,313.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,393.59 : 2,081.56 = 1,313.62 : x
2. Step 2: Convert to fraction form
   1,393.59/2,081.56 = 1,313.62/x
3. Step 3: Cross multiply
   1,393.59x = 2,081.56 × 1,313.62
4. Step 4: Simplify right side
   1,393.59x = 2,734,378.85
5. Step 5: Solve for x
   x = 2,734,378.85/1,393.59
6. Step 6: Final answer
   x = 1,962.11