Finding the Fourth Proportional to 3,546.78, 5,320.74 and 1,081.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,546.78 : 5,320.74 = 1,081.50 : x
2. Step 2: Convert to fraction form
   3,546.78/5,320.74 = 1,081.50/x
3. Step 3: Cross multiply
   3,546.78x = 5,320.74 × 1,081.50
4. Step 4: Simplify right side
   3,546.78x = 5,754,380.31
5. Step 5: Solve for x
   x = 5,754,380.31/3,546.78
6. Step 6: Final answer
   x = 1,622.42