Finding the Fourth Proportional to 2,007.90, 2,771.46 and 1,379.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.90 : 2,771.46 = 1,379.34 : x
2. Step 2: Convert to fraction form
   2,007.90/2,771.46 = 1,379.34/x
3. Step 3: Cross multiply
   2,007.90x = 2,771.46 × 1,379.34
4. Step 4: Simplify right side
   2,007.90x = 3,822,785.64
5. Step 5: Solve for x
   x = 3,822,785.64/2,007.90
6. Step 6: Final answer
   x = 1,903.87