Finding the Fourth Proportional to 1,085.38, 1,628.27 and 355.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,085.38 : 1,628.27 = 355.00 : x
2. Step 2: Convert to fraction form
   1,085.38/1,628.27 = 355.00/x
3. Step 3: Cross multiply
   1,085.38x = 1,628.27 × 355.00
4. Step 4: Simplify right side
   1,085.38x = 578,028.15
5. Step 5: Solve for x
   x = 578,028.15/1,085.38
6. Step 6: Final answer
   x = 532.56