Finding the Fourth Proportional to 3,609.31, 5,414.18 and 1,012.45

Step by Step Solution

1. Step 1: Write the proportion equation
   3,609.31 : 5,414.18 = 1,012.45 : x
2. Step 2: Convert to fraction form
   3,609.31/5,414.18 = 1,012.45/x
3. Step 3: Cross multiply
   3,609.31x = 5,414.18 × 1,012.45
4. Step 4: Simplify right side
   3,609.31x = 5,481,586.54
5. Step 5: Solve for x
   x = 5,481,586.54/3,609.31
6. Step 6: Final answer
   x = 1,518.74