Finding the Fourth Proportional to 2,662.19, 3,993.84 and 907.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,662.19 : 3,993.84 = 907.05 : x
2. Step 2: Convert to fraction form
   2,662.19/3,993.84 = 907.05/x
3. Step 3: Cross multiply
   2,662.19x = 3,993.84 × 907.05
4. Step 4: Simplify right side
   2,662.19x = 3,622,608.04
5. Step 5: Solve for x
   x = 3,622,608.04/2,662.19
6. Step 6: Final answer
   x = 1,360.76