Finding the Fourth Proportional to 3,846.40, 5,308.72 and 2,274.40

Step by Step Solution

1. Step 1: Write the proportion equation
   3,846.40 : 5,308.72 = 2,274.40 : x
2. Step 2: Convert to fraction form
   3,846.40/5,308.72 = 2,274.40/x
3. Step 3: Cross multiply
   3,846.40x = 5,308.72 × 2,274.40
4. Step 4: Simplify right side
   3,846.40x = 12,074,152.77
5. Step 5: Solve for x
   x = 12,074,152.77/3,846.40
6. Step 6: Final answer
   x = 3,139.08