Finding the Fourth Proportional to 1,760.39, 2,640.59 and 444.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,760.39 : 2,640.59 = 444.15 : x
2. Step 2: Convert to fraction form
   1,760.39/2,640.59 = 444.15/x
3. Step 3: Cross multiply
   1,760.39x = 2,640.59 × 444.15
4. Step 4: Simplify right side
   1,760.39x = 1,172,815.83
5. Step 5: Solve for x
   x = 1,172,815.83/1,760.39
6. Step 6: Final answer
   x = 666.22