Finding the Fourth Proportional to 1,437.78, 1,984.06 and 808.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,437.78 : 1,984.06 = 808.33 : x
2. Step 2: Convert to fraction form
   1,437.78/1,984.06 = 808.33/x
3. Step 3: Cross multiply
   1,437.78x = 1,984.06 × 808.33
4. Step 4: Simplify right side
   1,437.78x = 1,603,775.22
5. Step 5: Solve for x
   x = 1,603,775.22/1,437.78
6. Step 6: Final answer
   x = 1,115.45