Finding the Fourth Proportional to 9,786.28, 14,682.48 and 3,123.76

Step by Step Solution

1. Step 1: Write the proportion equation
   9,786.28 : 14,682.48 = 3,123.76 : x
2. Step 2: Convert to fraction form
   9,786.28/14,682.48 = 3,123.76/x
3. Step 3: Cross multiply
   9,786.28x = 14,682.48 × 3,123.76
4. Step 4: Simplify right side
   9,786.28x = 45,864,543.72
5. Step 5: Solve for x
   x = 45,864,543.72/9,786.28
6. Step 6: Final answer
   x = 4,686.62