Finding the Fourth Proportional to 12,277.31, 18,418.59 and 3,957.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,277.31 : 18,418.59 = 3,957.80 : x
2. Step 2: Convert to fraction form
   12,277.31/18,418.59 = 3,957.80/x
3. Step 3: Cross multiply
   12,277.31x = 18,418.59 × 3,957.80
4. Step 4: Simplify right side
   12,277.31x = 72,897,003.41
5. Step 5: Solve for x
   x = 72,897,003.41/12,277.31
6. Step 6: Final answer
   x = 5,937.54