Finding the Fourth Proportional to 1,604.21, 2,213.20 and 940.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,604.21 : 2,213.20 = 940.82 : x
2. Step 2: Convert to fraction form
   1,604.21/2,213.20 = 940.82/x
3. Step 3: Cross multiply
   1,604.21x = 2,213.20 × 940.82
4. Step 4: Simplify right side
   1,604.21x = 2,082,222.82
5. Step 5: Solve for x
   x = 2,082,222.82/1,604.21
6. Step 6: Final answer
   x = 1,297.97