Finding the Fourth Proportional to 8,358.28, 12,529.17 and 3,978.81

Step by Step Solution

1. Step 1: Write the proportion equation
   8,358.28 : 12,529.17 = 3,978.81 : x
2. Step 2: Convert to fraction form
   8,358.28/12,529.17 = 3,978.81/x
3. Step 3: Cross multiply
   8,358.28x = 12,529.17 × 3,978.81
4. Step 4: Simplify right side
   8,358.28x = 49,851,186.89
5. Step 5: Solve for x
   x = 49,851,186.89/8,358.28
6. Step 6: Final answer
   x = 5,964.29