Finding the Fourth Proportional to 1,208.22, 1,667.04 and 986.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,208.22 : 1,667.04 = 986.82 : x
2. Step 2: Convert to fraction form
   1,208.22/1,667.04 = 986.82/x
3. Step 3: Cross multiply
   1,208.22x = 1,667.04 × 986.82
4. Step 4: Simplify right side
   1,208.22x = 1,645,068.41
5. Step 5: Solve for x
   x = 1,645,068.41/1,208.22
6. Step 6: Final answer
   x = 1,361.56