Finding the Fourth Proportional to 1,444.75, 1,993.75 and 781.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,444.75 : 1,993.75 = 781.61 : x
2. Step 2: Convert to fraction form
   1,444.75/1,993.75 = 781.61/x
3. Step 3: Cross multiply
   1,444.75x = 1,993.75 × 781.61
4. Step 4: Simplify right side
   1,444.75x = 1,558,323.01
5. Step 5: Solve for x
   x = 1,558,323.01/1,444.75
6. Step 6: Final answer
   x = 1,078.61