Finding the Fourth Proportional to 1,388.33, 2,085.14 and 804.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388.33 : 2,085.14 = 804.50 : x
2. Step 2: Convert to fraction form
   1,388.33/2,085.14 = 804.50/x
3. Step 3: Cross multiply
   1,388.33x = 2,085.14 × 804.50
4. Step 4: Simplify right side
   1,388.33x = 1,677,488.50
5. Step 5: Solve for x
   x = 1,677,488.50/1,388.33
6. Step 6: Final answer
   x = 1,208.28