Finding the Fourth Proportional to 1,093.57, 1,509.33 and 621.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,093.57 : 1,509.33 = 621.52 : x
2. Step 2: Convert to fraction form
   1,093.57/1,509.33 = 621.52/x
3. Step 3: Cross multiply
   1,093.57x = 1,509.33 × 621.52
4. Step 4: Simplify right side
   1,093.57x = 938,078.78
5. Step 5: Solve for x
   x = 938,078.78/1,093.57
6. Step 6: Final answer
   x = 857.81