Finding the Fourth Proportional to 2,009.15, 2,771.46 and 1,211.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,009.15 : 2,771.46 = 1,211.93 : x
2. Step 2: Convert to fraction form
   2,009.15/2,771.46 = 1,211.93/x
3. Step 3: Cross multiply
   2,009.15x = 2,771.46 × 1,211.93
4. Step 4: Simplify right side
   2,009.15x = 3,358,815.52
5. Step 5: Solve for x
   x = 3,358,815.52/2,009.15
6. Step 6: Final answer
   x = 1,671.76