Finding the Fourth Proportional to 3,390.54, 5,084.73 and 1,081.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,390.54 : 5,084.73 = 1,081.50 : x
2. Step 2: Convert to fraction form
   3,390.54/5,084.73 = 1,081.50/x
3. Step 3: Cross multiply
   3,390.54x = 5,084.73 × 1,081.50
4. Step 4: Simplify right side
   3,390.54x = 5,499,135.50
5. Step 5: Solve for x
   x = 5,499,135.50/3,390.54
6. Step 6: Final answer
   x = 1,621.91