Finding the Fourth Proportional to 1,085.14, 1,627.72 and 354.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.14 : 1,627.72 = 354.72 : x
2. Step 2: Convert to fraction form
   1,085.14/1,627.72 = 354.72/x
3. Step 3: Cross multiply
   1,085.14x = 1,627.72 × 354.72
4. Step 4: Simplify right side
   1,085.14x = 577,384.84
5. Step 5: Solve for x
   x = 577,384.84/1,085.14
6. Step 6: Final answer
   x = 532.08