Finding the Fourth Proportional to 12,439.96, 18,661.76 and 5,868.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,439.96 : 18,661.76 = 5,868.02 : x
2. Step 2: Convert to fraction form
   12,439.96/18,661.76 = 5,868.02/x
3. Step 3: Cross multiply
   12,439.96x = 18,661.76 × 5,868.02
4. Step 4: Simplify right side
   12,439.96x = 109,507,580.92
5. Step 5: Solve for x
   x = 109,507,580.92/12,439.96
6. Step 6: Final answer
   x = 8,802.89