Finding the Fourth Proportional to 1,367.91, 1,887.75 and 808.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,367.91 : 1,887.75 = 808.38 : x
2. Step 2: Convert to fraction form
   1,367.91/1,887.75 = 808.38/x
3. Step 3: Cross multiply
   1,367.91x = 1,887.75 × 808.38
4. Step 4: Simplify right side
   1,367.91x = 1,526,019.35
5. Step 5: Solve for x
   x = 1,526,019.35/1,367.91
6. Step 6: Final answer
   x = 1,115.58