Finding the Fourth Proportional to 3,426.54, 5,138.79 and 1,782.19

Step by Step Solution

1. Step 1: Write the proportion equation
   3,426.54 : 5,138.79 = 1,782.19 : x
2. Step 2: Convert to fraction form
   3,426.54/5,138.79 = 1,782.19/x
3. Step 3: Cross multiply
   3,426.54x = 5,138.79 × 1,782.19
4. Step 4: Simplify right side
   3,426.54x = 9,158,300.15
5. Step 5: Solve for x
   x = 9,158,300.15/3,426.54
6. Step 6: Final answer
   x = 2,672.75