Finding the Fourth Proportional to 1,003.98, 1,386.27 and 808.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,003.98 : 1,386.27 = 808.41 : x
2. Step 2: Convert to fraction form
   1,003.98/1,386.27 = 808.41/x
3. Step 3: Cross multiply
   1,003.98x = 1,386.27 × 808.41
4. Step 4: Simplify right side
   1,003.98x = 1,120,674.53
5. Step 5: Solve for x
   x = 1,120,674.53/1,003.98
6. Step 6: Final answer
   x = 1,116.23