Finding the Fourth Proportional to 12,251.42, 18,371.42 and 3,929.56

Step by Step Solution

1. Step 1: Write the proportion equation
   12,251.42 : 18,371.42 = 3,929.56 : x
2. Step 2: Convert to fraction form
   12,251.42/18,371.42 = 3,929.56/x
3. Step 3: Cross multiply
   12,251.42x = 18,371.42 × 3,929.56
4. Step 4: Simplify right side
   12,251.42x = 72,191,597.18
5. Step 5: Solve for x
   x = 72,191,597.18/12,251.42
6. Step 6: Final answer
   x = 5,892.51