Finding the Fourth Proportional to 1,081.63, 1,622.69 and 351.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081.63 : 1,622.69 = 351.28 : x
2. Step 2: Convert to fraction form
   1,081.63/1,622.69 = 351.28/x
3. Step 3: Cross multiply
   1,081.63x = 1,622.69 × 351.28
4. Step 4: Simplify right side
   1,081.63x = 570,018.54
5. Step 5: Solve for x
   x = 570,018.54/1,081.63
6. Step 6: Final answer
   x = 527.00