Finding the Fourth Proportional to 3,881.42, 5,356.46 and 2,288.21

Step by Step Solution

1. Step 1: Write the proportion equation
   3,881.42 : 5,356.46 = 2,288.21 : x
2. Step 2: Convert to fraction form
   3,881.42/5,356.46 = 2,288.21/x
3. Step 3: Cross multiply
   3,881.42x = 5,356.46 × 2,288.21
4. Step 4: Simplify right side
   3,881.42x = 12,256,667.11
5. Step 5: Solve for x
   x = 12,256,667.11/3,881.42
6. Step 6: Final answer
   x = 3,157.78