Finding the Fourth Proportional to 1,444.31, 1,993.16 and 781.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,444.31 : 1,993.16 = 781.17 : x
2. Step 2: Convert to fraction form
   1,444.31/1,993.16 = 781.17/x
3. Step 3: Cross multiply
   1,444.31x = 1,993.16 × 781.17
4. Step 4: Simplify right side
   1,444.31x = 1,556,987.91
5. Step 5: Solve for x
   x = 1,556,987.91/1,444.31
6. Step 6: Final answer
   x = 1,078.01