Finding the Fourth Proportional to 9,478.98, 14,212.40 and 3,936.15

Step by Step Solution

1. Step 1: Write the proportion equation
   9,478.98 : 14,212.40 = 3,936.15 : x
2. Step 2: Convert to fraction form
   9,478.98/14,212.40 = 3,936.15/x
3. Step 3: Cross multiply
   9,478.98x = 14,212.40 × 3,936.15
4. Step 4: Simplify right side
   9,478.98x = 55,942,118.58
5. Step 5: Solve for x
   x = 55,942,118.58/9,478.98
6. Step 6: Final answer
   x = 5,901.70