Finding the Fourth Proportional to 2,185.65, 3,015.50 and 1,556.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185.65 : 3,015.50 = 1,556.28 : x
2. Step 2: Convert to fraction form
   2,185.65/3,015.50 = 1,556.28/x
3. Step 3: Cross multiply
   2,185.65x = 3,015.50 × 1,556.28
4. Step 4: Simplify right side
   2,185.65x = 4,692,954.56
5. Step 5: Solve for x
   x = 4,692,954.56/2,185.65
6. Step 6: Final answer
   x = 2,147.17