Finding the Fourth Proportional to 2,776.03, 4,164.77 and 1,389.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,776.03 : 4,164.77 = 1,389.31 : x
2. Step 2: Convert to fraction form
   2,776.03/4,164.77 = 1,389.31/x
3. Step 3: Cross multiply
   2,776.03x = 4,164.77 × 1,389.31
4. Step 4: Simplify right side
   2,776.03x = 5,786,149.66
5. Step 5: Solve for x
   x = 5,786,149.66/2,776.03
6. Step 6: Final answer
   x = 2,084.33