Finding the Fourth Proportional to 2,091.54, 3,132.31 and 1,212.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,091.54 : 3,132.31 = 1,212.18 : x
2. Step 2: Convert to fraction form
   2,091.54/3,132.31 = 1,212.18/x
3. Step 3: Cross multiply
   2,091.54x = 3,132.31 × 1,212.18
4. Step 4: Simplify right side
   2,091.54x = 3,796,923.54
5. Step 5: Solve for x
   x = 3,796,923.54/2,091.54
6. Step 6: Final answer
   x = 1,815.37