Finding the Fourth Proportional to 3,678.84, 5,517.54 and 1,081.17

Step by Step Solution

1. Step 1: Write the proportion equation
   3,678.84 : 5,517.54 = 1,081.17 : x
2. Step 2: Convert to fraction form
   3,678.84/5,517.54 = 1,081.17/x
3. Step 3: Cross multiply
   3,678.84x = 5,517.54 × 1,081.17
4. Step 4: Simplify right side
   3,678.84x = 5,965,398.72
5. Step 5: Solve for x
   x = 5,965,398.72/3,678.84
6. Step 6: Final answer
   x = 1,621.54