Finding the Fourth Proportional to 2,011.10, 3,017.72 and 1,918.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,011.10 : 3,017.72 = 1,918.22 : x
2. Step 2: Convert to fraction form
   2,011.10/3,017.72 = 1,918.22/x
3. Step 3: Cross multiply
   2,011.10x = 3,017.72 × 1,918.22
4. Step 4: Simplify right side
   2,011.10x = 5,788,640.57
5. Step 5: Solve for x
   x = 5,788,640.57/2,011.10
6. Step 6: Final answer
   x = 2,878.35