Finding the Fourth Proportional to 3,933.82, 5,428.74 and 2,255.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,933.82 : 5,428.74 = 2,255.50 : x
2. Step 2: Convert to fraction form
   3,933.82/5,428.74 = 2,255.50/x
3. Step 3: Cross multiply
   3,933.82x = 5,428.74 × 2,255.50
4. Step 4: Simplify right side
   3,933.82x = 12,244,523.07
5. Step 5: Solve for x
   x = 12,244,523.07/3,933.82
6. Step 6: Final answer
   x = 3,112.63