Finding the Fourth Proportional to 2,129.30, 3,189.31 and 1,031.34

Step by Step Solution

1. Step 1: Write the proportion equation
   2,129.30 : 3,189.31 = 1,031.34 : x
2. Step 2: Convert to fraction form
   2,129.30/3,189.31 = 1,031.34/x
3. Step 3: Cross multiply
   2,129.30x = 3,189.31 × 1,031.34
4. Step 4: Simplify right side
   2,129.30x = 3,289,262.98
5. Step 5: Solve for x
   x = 3,289,262.98/2,129.30
6. Step 6: Final answer
   x = 1,544.76