Finding the Fourth Proportional to 2,780.69, 4,168.80 and 1,393.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,780.69 : 4,168.80 = 1,393.29 : x
2. Step 2: Convert to fraction form
   2,780.69/4,168.80 = 1,393.29/x
3. Step 3: Cross multiply
   2,780.69x = 4,168.80 × 1,393.29
4. Step 4: Simplify right side
   2,780.69x = 5,808,347.35
5. Step 5: Solve for x
   x = 5,808,347.35/2,780.69
6. Step 6: Final answer
   x = 2,088.82