Finding the Fourth Proportional to 2,577.83, 3,559.56 and 1,917.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,577.83 : 3,559.56 = 1,917.63 : x
2. Step 2: Convert to fraction form
   2,577.83/3,559.56 = 1,917.63/x
3. Step 3: Cross multiply
   2,577.83x = 3,559.56 × 1,917.63
4. Step 4: Simplify right side
   2,577.83x = 6,825,919.04
5. Step 5: Solve for x
   x = 6,825,919.04/2,577.83
6. Step 6: Final answer
   x = 2,647.94