Finding the Fourth Proportional to 1,538.82, 2,308.41 and 443.36

Step by Step Solution

1. Step 1: Write the proportion equation
   1,538.82 : 2,308.41 = 443.36 : x
2. Step 2: Convert to fraction form
   1,538.82/2,308.41 = 443.36/x
3. Step 3: Cross multiply
   1,538.82x = 2,308.41 × 443.36
4. Step 4: Simplify right side
   1,538.82x = 1,023,462.43
5. Step 5: Solve for x
   x = 1,023,462.43/1,538.82
6. Step 6: Final answer
   x = 665.10