Finding the Fourth Proportional to 1,456.31, 2,011.37 and 961.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,456.31 : 2,011.37 = 961.15 : x
2. Step 2: Convert to fraction form
   1,456.31/2,011.37 = 961.15/x
3. Step 3: Cross multiply
   1,456.31x = 2,011.37 × 961.15
4. Step 4: Simplify right side
   1,456.31x = 1,933,218.44
5. Step 5: Solve for x
   x = 1,933,218.44/1,456.31
6. Step 6: Final answer
   x = 1,327.48