Finding the Fourth Proportional to 9,786.40, 14,686.28 and 3,943.46

Step by Step Solution

1. Step 1: Write the proportion equation
   9,786.40 : 14,686.28 = 3,943.46 : x
2. Step 2: Convert to fraction form
   9,786.40/14,686.28 = 3,943.46/x
3. Step 3: Cross multiply
   9,786.40x = 14,686.28 × 3,943.46
4. Step 4: Simplify right side
   9,786.40x = 57,914,757.73
5. Step 5: Solve for x
   x = 57,914,757.73/9,786.40
6. Step 6: Final answer
   x = 5,917.88