Finding the Fourth Proportional to 2,782.05, 4,173.89 and 1,319.19

Step by Step Solution

1. Step 1: Write the proportion equation
   2,782.05 : 4,173.89 = 1,319.19 : x
2. Step 2: Convert to fraction form
   2,782.05/4,173.89 = 1,319.19/x
3. Step 3: Cross multiply
   2,782.05x = 4,173.89 × 1,319.19
4. Step 4: Simplify right side
   2,782.05x = 5,506,147.35
5. Step 5: Solve for x
   x = 5,506,147.35/2,782.05
6. Step 6: Final answer
   x = 1,979.17