Finding the Fourth Proportional to 1,456.10, 2,180.42 and 961.01

Step by Step Solution

1. Step 1: Write the proportion equation
   1,456.10 : 2,180.42 = 961.01 : x
2. Step 2: Convert to fraction form
   1,456.10/2,180.42 = 961.01/x
3. Step 3: Cross multiply
   1,456.10x = 2,180.42 × 961.01
4. Step 4: Simplify right side
   1,456.10x = 2,095,405.42
5. Step 5: Solve for x
   x = 2,095,405.42/1,456.10
6. Step 6: Final answer
   x = 1,439.05