Finding the Fourth Proportional to 1,104.30, 1,648.34 and 1,031.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,104.30 : 1,648.34 = 1,031.34 : x
2. Step 2: Convert to fraction form
   1,104.30/1,648.34 = 1,031.34/x
3. Step 3: Cross multiply
   1,104.30x = 1,648.34 × 1,031.34
4. Step 4: Simplify right side
   1,104.30x = 1,699,993.82
5. Step 5: Solve for x
   x = 1,699,993.82/1,104.30
6. Step 6: Final answer
   x = 1,539.43