Finding the Fourth Proportional to 1,403.08, 1,936.18 and 781.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,403.08 : 1,936.18 = 781.96 : x
2. Step 2: Convert to fraction form
   1,403.08/1,936.18 = 781.96/x
3. Step 3: Cross multiply
   1,403.08x = 1,936.18 × 781.96
4. Step 4: Simplify right side
   1,403.08x = 1,514,015.31
5. Step 5: Solve for x
   x = 1,514,015.31/1,403.08
6. Step 6: Final answer
   x = 1,079.07