Finding the Fourth Proportional to 2,845.40, 4,266.31 and 870.37

Step by Step Solution

1. Step 1: Write the proportion equation
   2,845.40 : 4,266.31 = 870.37 : x
2. Step 2: Convert to fraction form
   2,845.40/4,266.31 = 870.37/x
3. Step 3: Cross multiply
   2,845.40x = 4,266.31 × 870.37
4. Step 4: Simplify right side
   2,845.40x = 3,713,255.39
5. Step 5: Solve for x
   x = 3,713,255.39/2,845.40
6. Step 6: Final answer
   x = 1,305.01