Finding the Fourth Proportional to 2,085.36, 3,128.19 and 624.53

Step by Step Solution

1. Step 1: Write the proportion equation
   2,085.36 : 3,128.19 = 624.53 : x
2. Step 2: Convert to fraction form
   2,085.36/3,128.19 = 624.53/x
3. Step 3: Cross multiply
   2,085.36x = 3,128.19 × 624.53
4. Step 4: Simplify right side
   2,085.36x = 1,953,632.86
5. Step 5: Solve for x
   x = 1,953,632.86/2,085.36
6. Step 6: Final answer
   x = 936.83