Finding the Fourth Proportional to 3,931.72, 5,426 and 2,253.52

Step by Step Solution

1. Step 1: Write the proportion equation
   3,931.72 : 5,426 = 2,253.52 : x
2. Step 2: Convert to fraction form
   3,931.72/5,426 = 2,253.52/x
3. Step 3: Cross multiply
   3,931.72x = 5,426 × 2,253.52
4. Step 4: Simplify right side
   3,931.72x = 12,227,599.52
5. Step 5: Solve for x
   x = 12,227,599.52/3,931.72
6. Step 6: Final answer
   x = 3,109.99