Finding the Fourth Proportional to 10,718.64, 16,057.56 and 5,155.56

Step by Step Solution

1. Step 1: Write the proportion equation
   10,718.64 : 16,057.56 = 5,155.56 : x
2. Step 2: Convert to fraction form
   10,718.64/16,057.56 = 5,155.56/x
3. Step 3: Cross multiply
   10,718.64x = 16,057.56 × 5,155.56
4. Step 4: Simplify right side
   10,718.64x = 82,785,714.03
5. Step 5: Solve for x
   x = 82,785,714.03/10,718.64
6. Step 6: Final answer
   x = 7,723.53