Finding the Fourth Proportional to 2,112.14, 3,168.23 and 1,386.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.14 : 3,168.23 = 1,386.32 : x
2. Step 2: Convert to fraction form
   2,112.14/3,168.23 = 1,386.32/x
3. Step 3: Cross multiply
   2,112.14x = 3,168.23 × 1,386.32
4. Step 4: Simplify right side
   2,112.14x = 4,392,180.61
5. Step 5: Solve for x
   x = 4,392,180.61/2,112.14
6. Step 6: Final answer
   x = 2,079.49