Finding the Fourth Proportional to 9,786.72, 14,679.90 and 2,391.06

Step by Step Solution

1. Step 1: Write the proportion equation
   9,786.72 : 14,679.90 = 2,391.06 : x
2. Step 2: Convert to fraction form
   9,786.72/14,679.90 = 2,391.06/x
3. Step 3: Cross multiply
   9,786.72x = 14,679.90 × 2,391.06
4. Step 4: Simplify right side
   9,786.72x = 35,100,521.69
5. Step 5: Solve for x
   x = 35,100,521.69/9,786.72
6. Step 6: Final answer
   x = 3,586.55