Finding the Fourth Proportional to 12,251.89, 18,375.13 and 3,930.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,251.89 : 18,375.13 = 3,930.31 : x
2. Step 2: Convert to fraction form
   12,251.89/18,375.13 = 3,930.31/x
3. Step 3: Cross multiply
   12,251.89x = 18,375.13 × 3,930.31
4. Step 4: Simplify right side
   12,251.89x = 72,219,957.19
5. Step 5: Solve for x
   x = 72,219,957.19/12,251.89
6. Step 6: Final answer
   x = 5,894.60