Finding the Fourth Proportional to 10,568.79, 15,864.72 and 7,786.83

Step by Step Solution

1. Step 1: Write the proportion equation
   10,568.79 : 15,864.72 = 7,786.83 : x
2. Step 2: Convert to fraction form
   10,568.79/15,864.72 = 7,786.83/x
3. Step 3: Cross multiply
   10,568.79x = 15,864.72 × 7,786.83
4. Step 4: Simplify right side
   10,568.79x = 123,535,877.64
5. Step 5: Solve for x
   x = 123,535,877.64/10,568.79
6. Step 6: Final answer
   x = 11,688.74