Finding the Fourth Proportional to 1,367.68, 1,887.72 and 808.24

Step by Step Solution

1. Step 1: Write the proportion equation
   1,367.68 : 1,887.72 = 808.24 : x
2. Step 2: Convert to fraction form
   1,367.68/1,887.72 = 808.24/x
3. Step 3: Cross multiply
   1,367.68x = 1,887.72 × 808.24
4. Step 4: Simplify right side
   1,367.68x = 1,525,730.81
5. Step 5: Solve for x
   x = 1,525,730.81/1,367.68
6. Step 6: Final answer
   x = 1,115.56