Finding the Fourth Proportional to 1,855.72, 2,556.90 and 1,331.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,855.72 : 2,556.90 = 1,331.56 : x
2. Step 2: Convert to fraction form
   1,855.72/2,556.90 = 1,331.56/x
3. Step 3: Cross multiply
   1,855.72x = 2,556.90 × 1,331.56
4. Step 4: Simplify right side
   1,855.72x = 3,404,665.76
5. Step 5: Solve for x
   x = 3,404,665.76/1,855.72
6. Step 6: Final answer
   x = 1,834.69