Finding the Fourth Proportional to 1,388.05, 2,081.94 and 362.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388.05 : 2,081.94 = 362.05 : x
2. Step 2: Convert to fraction form
   1,388.05/2,081.94 = 362.05/x
3. Step 3: Cross multiply
   1,388.05x = 2,081.94 × 362.05
4. Step 4: Simplify right side
   1,388.05x = 753,766.38
5. Step 5: Solve for x
   x = 753,766.38/1,388.05
6. Step 6: Final answer
   x = 543.04