Finding the Fourth Proportional to 2,577.89, 3,867.42 and 1,117.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,577.89 : 3,867.42 = 1,117.28 : x
2. Step 2: Convert to fraction form
   2,577.89/3,867.42 = 1,117.28/x
3. Step 3: Cross multiply
   2,577.89x = 3,867.42 × 1,117.28
4. Step 4: Simplify right side
   2,577.89x = 4,320,991.02
5. Step 5: Solve for x
   x = 4,320,991.02/2,577.89
6. Step 6: Final answer
   x = 1,676.17