Finding the Fourth Proportional to 1,080.83, 1,620.83 and 350.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,080.83 : 1,620.83 = 350.21 : x
2. Step 2: Convert to fraction form
   1,080.83/1,620.83 = 350.21/x
3. Step 3: Cross multiply
   1,080.83x = 1,620.83 × 350.21
4. Step 4: Simplify right side
   1,080.83x = 567,621.02
5. Step 5: Solve for x
   x = 567,621.02/1,080.83
6. Step 6: Final answer
   x = 525.17