Finding the Fourth Proportional to 13,568.79, 18,724.38 and 7,903.72

Step by Step Solution

1. Step 1: Write the proportion equation
   13,568.79 : 18,724.38 = 7,903.72 : x
2. Step 2: Convert to fraction form
   13,568.79/18,724.38 = 7,903.72/x
3. Step 3: Cross multiply
   13,568.79x = 18,724.38 × 7,903.72
4. Step 4: Simplify right side
   13,568.79x = 147,992,256.69
5. Step 5: Solve for x
   x = 147,992,256.69/13,568.79
6. Step 6: Final answer
   x = 10,906.81