Finding the Fourth Proportional to 2,776.43, 4,162.58 and 1,313.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,776.43 : 4,162.58 = 1,313.87 : x
2. Step 2: Convert to fraction form
   2,776.43/4,162.58 = 1,313.87/x
3. Step 3: Cross multiply
   2,776.43x = 4,162.58 × 1,313.87
4. Step 4: Simplify right side
   2,776.43x = 5,469,061.60
5. Step 5: Solve for x
   x = 5,469,061.60/2,776.43
6. Step 6: Final answer
   x = 1,969.82