Finding the Fourth Proportional to 2,007.10, 3,009.30 and 910.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,007.10 : 3,009.30 = 910.90 : x
2. Step 2: Convert to fraction form
   2,007.10/3,009.30 = 910.90/x
3. Step 3: Cross multiply
   2,007.10x = 3,009.30 × 910.90
4. Step 4: Simplify right side
   2,007.10x = 2,741,171.37
5. Step 5: Solve for x
   x = 2,741,171.37/2,007.10
6. Step 6: Final answer
   x = 1,365.74