Finding the Fourth Proportional to 2,662.58, 3,990.16 and 1,361.30

Step by Step Solution

1. Step 1: Write the proportion equation
   2,662.58 : 3,990.16 = 1,361.30 : x
2. Step 2: Convert to fraction form
   2,662.58/3,990.16 = 1,361.30/x
3. Step 3: Cross multiply
   2,662.58x = 3,990.16 × 1,361.30
4. Step 4: Simplify right side
   2,662.58x = 5,431,804.81
5. Step 5: Solve for x
   x = 5,431,804.81/2,662.58
6. Step 6: Final answer
   x = 2,040.05