Finding the Fourth Proportional to 2,380.23, 3,570.33 and 820.26

Step by Step Solution

1. Step 1: Write the proportion equation
   2,380.23 : 3,570.33 = 820.26 : x
2. Step 2: Convert to fraction form
   2,380.23/3,570.33 = 820.26/x
3. Step 3: Cross multiply
   2,380.23x = 3,570.33 × 820.26
4. Step 4: Simplify right side
   2,380.23x = 2,928,598.89
5. Step 5: Solve for x
   x = 2,928,598.89/2,380.23
6. Step 6: Final answer
   x = 1,230.38