Finding the Fourth Proportional to 2,112.60, 3,164.87 and 1,185.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.60 : 3,164.87 = 1,185.35 : x
2. Step 2: Convert to fraction form
   2,112.60/3,164.87 = 1,185.35/x
3. Step 3: Cross multiply
   2,112.60x = 3,164.87 × 1,185.35
4. Step 4: Simplify right side
   2,112.60x = 3,751,456.90
5. Step 5: Solve for x
   x = 3,751,456.90/2,112.60
6. Step 6: Final answer
   x = 1,775.75