Finding the Fourth Proportional to 2,577.16, 3,556.74 and 1,986.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,577.16 : 3,556.74 = 1,986.76 : x
2. Step 2: Convert to fraction form
   2,577.16/3,556.74 = 1,986.76/x
3. Step 3: Cross multiply
   2,577.16x = 3,556.74 × 1,986.76
4. Step 4: Simplify right side
   2,577.16x = 7,066,388.76
5. Step 5: Solve for x
   x = 7,066,388.76/2,577.16
6. Step 6: Final answer
   x = 2,741.93