Finding the Fourth Proportional to 1,367.89, 1,887.28 and 808.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,367.89 : 1,887.28 = 808.41 : x
2. Step 2: Convert to fraction form
   1,367.89/1,887.28 = 808.41/x
3. Step 3: Cross multiply
   1,367.89x = 1,887.28 × 808.41
4. Step 4: Simplify right side
   1,367.89x = 1,525,696.02
5. Step 5: Solve for x
   x = 1,525,696.02/1,367.89
6. Step 6: Final answer
   x = 1,115.36