Finding the Fourth Proportional to 2,705.81, 4,056.89 and 1,319.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,705.81 : 4,056.89 = 1,319.49 : x
2. Step 2: Convert to fraction form
   2,705.81/4,056.89 = 1,319.49/x
3. Step 3: Cross multiply
   2,705.81x = 4,056.89 × 1,319.49
4. Step 4: Simplify right side
   2,705.81x = 5,353,019.19
5. Step 5: Solve for x
   x = 5,353,019.19/2,705.81
6. Step 6: Final answer
   x = 1,978.35