Finding the Fourth Proportional to 12,257.96, 18,389.33 and 3,937.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,257.96 : 18,389.33 = 3,937.34 : x
2. Step 2: Convert to fraction form
   12,257.96/18,389.33 = 3,937.34/x
3. Step 3: Cross multiply
   12,257.96x = 18,389.33 × 3,937.34
4. Step 4: Simplify right side
   12,257.96x = 72,404,932.95
5. Step 5: Solve for x
   x = 72,404,932.95/12,257.96
6. Step 6: Final answer
   x = 5,906.77