Finding the Fourth Proportional to 2,112.62, 2,918.81 and 1,801.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,112.62 : 2,918.81 = 1,801.18 : x
2. Step 2: Convert to fraction form
   2,112.62/2,918.81 = 1,801.18/x
3. Step 3: Cross multiply
   2,112.62x = 2,918.81 × 1,801.18
4. Step 4: Simplify right side
   2,112.62x = 5,257,302.20
5. Step 5: Solve for x
   x = 5,257,302.20/2,112.62
6. Step 6: Final answer
   x = 2,488.52