Finding the Fourth Proportional to 3,628.17, 5,442.39 and 1,031.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,628.17 : 5,442.39 = 1,031.31 : x
2. Step 2: Convert to fraction form
   3,628.17/5,442.39 = 1,031.31/x
3. Step 3: Cross multiply
   3,628.17x = 5,442.39 × 1,031.31
4. Step 4: Simplify right side
   3,628.17x = 5,612,791.23
5. Step 5: Solve for x
   x = 5,612,791.23/3,628.17
6. Step 6: Final answer
   x = 1,547.00