Finding the Fourth Proportional to 8,453.92, 12,680.92 and 5,123

Step by Step Solution

1. Step 1: Write the proportion equation
   8,453.92 : 12,680.92 = 5,123 : x
2. Step 2: Convert to fraction form
   8,453.92/12,680.92 = 5,123/x
3. Step 3: Cross multiply
   8,453.92x = 12,680.92 × 5,123
4. Step 4: Simplify right side
   8,453.92x = 64,964,353.16
5. Step 5: Solve for x
   x = 64,964,353.16/8,453.92
6. Step 6: Final answer
   x = 7,684.52