Finding the Fourth Proportional to 9,786.21, 14,680.15 and 3,123.69

Step by Step Solution

1. Step 1: Write the proportion equation
   9,786.21 : 14,680.15 = 3,123.69 : x
2. Step 2: Convert to fraction form
   9,786.21/14,680.15 = 3,123.69/x
3. Step 3: Cross multiply
   9,786.21x = 14,680.15 × 3,123.69
4. Step 4: Simplify right side
   9,786.21x = 45,856,237.75
5. Step 5: Solve for x
   x = 45,856,237.75/9,786.21
6. Step 6: Final answer
   x = 4,685.80