Finding the Fourth Proportional to 1,555.03, 2,145.94 and 856.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,555.03 : 2,145.94 = 856.41 : x
2. Step 2: Convert to fraction form
   1,555.03/2,145.94 = 856.41/x
3. Step 3: Cross multiply
   1,555.03x = 2,145.94 × 856.41
4. Step 4: Simplify right side
   1,555.03x = 1,837,799.10
5. Step 5: Solve for x
   x = 1,837,799.10/1,555.03
6. Step 6: Final answer
   x = 1,181.84