Finding the Fourth Proportional to 1,085.62, 1,627.71 and 354.94

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.62 : 1,627.71 = 354.94 : x
2. Step 2: Convert to fraction form
   1,085.62/1,627.71 = 354.94/x
3. Step 3: Cross multiply
   1,085.62x = 1,627.71 × 354.94
4. Step 4: Simplify right side
   1,085.62x = 577,739.39
5. Step 5: Solve for x
   x = 577,739.39/1,085.62
6. Step 6: Final answer
   x = 532.17