Finding the Fourth Proportional to 3,953.10, 5,454.78 and 2,274.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,953.10 : 5,454.78 = 2,274.12 : x
2. Step 2: Convert to fraction form
   3,953.10/5,454.78 = 2,274.12/x
3. Step 3: Cross multiply
   3,953.10x = 5,454.78 × 2,274.12
4. Step 4: Simplify right side
   3,953.10x = 12,404,824.29
5. Step 5: Solve for x
   x = 12,404,824.29/3,953.10
6. Step 6: Final answer
   x = 3,138.00