Finding the Fourth Proportional to 1,820.57, 2,513.33 and 1,226.18

Step by Step Solution

1. Step 1: Write the proportion equation
   1,820.57 : 2,513.33 = 1,226.18 : x
2. Step 2: Convert to fraction form
   1,820.57/2,513.33 = 1,226.18/x
3. Step 3: Cross multiply
   1,820.57x = 2,513.33 × 1,226.18
4. Step 4: Simplify right side
   1,820.57x = 3,081,776.28
5. Step 5: Solve for x
   x = 3,081,776.28/1,820.57
6. Step 6: Final answer
   x = 1,692.76