Finding the Fourth Proportional to 2,780.08, 4,169.79 and 1,393.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,780.08 : 4,169.79 = 1,393.15 : x
2. Step 2: Convert to fraction form
   2,780.08/4,169.79 = 1,393.15/x
3. Step 3: Cross multiply
   2,780.08x = 4,169.79 × 1,393.15
4. Step 4: Simplify right side
   2,780.08x = 5,809,142.94
5. Step 5: Solve for x
   x = 5,809,142.94/2,780.08
6. Step 6: Final answer
   x = 2,089.56