Finding the Fourth Proportional to 12,314.28, 18,473.76 and 3,993.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,314.28 : 18,473.76 = 3,993.60 : x
2. Step 2: Convert to fraction form
   12,314.28/18,473.76 = 3,993.60/x
3. Step 3: Cross multiply
   12,314.28x = 18,473.76 × 3,993.60
4. Step 4: Simplify right side
   12,314.28x = 73,776,807.94
5. Step 5: Solve for x
   x = 73,776,807.94/12,314.28
6. Step 6: Final answer
   x = 5,991.16