Finding the Fourth Proportional to 8,322.96, 12,475.76 and 3,390.56

Step by Step Solution

1. Step 1: Write the proportion equation
   8,322.96 : 12,475.76 = 3,390.56 : x
2. Step 2: Convert to fraction form
   8,322.96/12,475.76 = 3,390.56/x
3. Step 3: Cross multiply
   8,322.96x = 12,475.76 × 3,390.56
4. Step 4: Simplify right side
   8,322.96x = 42,299,812.83
5. Step 5: Solve for x
   x = 42,299,812.83/8,322.96
6. Step 6: Final answer
   x = 5,082.30