Finding the Fourth Proportional to 1,085.42, 1,628.27 and 354.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.42 : 1,628.27 = 354.83 : x
2. Step 2: Convert to fraction form
   1,085.42/1,628.27 = 354.83/x
3. Step 3: Cross multiply
   1,085.42x = 1,628.27 × 354.83
4. Step 4: Simplify right side
   1,085.42x = 577,749.13
5. Step 5: Solve for x
   x = 577,749.13/1,085.42
6. Step 6: Final answer
   x = 532.28