Finding the Fourth Proportional to 1,085.35, 1,627.89 and 354.87

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.35 : 1,627.89 = 354.87 : x
2. Step 2: Convert to fraction form
   1,085.35/1,627.89 = 354.87/x
3. Step 3: Cross multiply
   1,085.35x = 1,627.89 × 354.87
4. Step 4: Simplify right side
   1,085.35x = 577,689.32
5. Step 5: Solve for x
   x = 577,689.32/1,085.35
6. Step 6: Final answer
   x = 532.26