Finding the Fourth Proportional to 2,007.43, 2,771.34 and 1,210.89

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.43 : 2,771.34 = 1,210.89 : x
2. Step 2: Convert to fraction form
   2,007.43/2,771.34 = 1,210.89/x
3. Step 3: Cross multiply
   2,007.43x = 2,771.34 × 1,210.89
4. Step 4: Simplify right side
   2,007.43x = 3,355,787.89
5. Step 5: Solve for x
   x = 3,355,787.89/2,007.43
6. Step 6: Final answer
   x = 1,671.68