Finding the Fourth Proportional to 1,388.33, 2,081.82 and 414.17

Step by Step Solution

1. Step 1: Write the proportion equation
   1,388.33 : 2,081.82 = 414.17 : x
2. Step 2: Convert to fraction form
   1,388.33/2,081.82 = 414.17/x
3. Step 3: Cross multiply
   1,388.33x = 2,081.82 × 414.17
4. Step 4: Simplify right side
   1,388.33x = 862,227.39
5. Step 5: Solve for x
   x = 862,227.39/1,388.33
6. Step 6: Final answer
   x = 621.05