Finding the Fourth Proportional to 1,850.56, 2,785.12 and 1,390.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,850.56 : 2,785.12 = 1,390.72 : x
2. Step 2: Convert to fraction form
   1,850.56/2,785.12 = 1,390.72/x
3. Step 3: Cross multiply
   1,850.56x = 2,785.12 × 1,390.72
4. Step 4: Simplify right side
   1,850.56x = 3,873,322.09
5. Step 5: Solve for x
   x = 3,873,322.09/1,850.56
6. Step 6: Final answer
   x = 2,093.05