Finding the Fourth Proportional to 2,793.12, 4,190.59 and 1,405.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,793.12 : 4,190.59 = 1,405.79 : x
2. Step 2: Convert to fraction form
   2,793.12/4,190.59 = 1,405.79/x
3. Step 3: Cross multiply
   2,793.12x = 4,190.59 × 1,405.79
4. Step 4: Simplify right side
   2,793.12x = 5,891,089.52
5. Step 5: Solve for x
   x = 5,891,089.52/2,793.12
6. Step 6: Final answer
   x = 2,109.15