Finding the Fourth Proportional to 10,808.64, 16,206.72 and 4,145.76

Step by Step Solution

1. Step 1: Write the proportion equation
   10,808.64 : 16,206.72 = 4,145.76 : x
2. Step 2: Convert to fraction form
   10,808.64/16,206.72 = 4,145.76/x
3. Step 3: Cross multiply
   10,808.64x = 16,206.72 × 4,145.76
4. Step 4: Simplify right side
   10,808.64x = 67,189,171.51
5. Step 5: Solve for x
   x = 67,189,171.51/10,808.64
6. Step 6: Final answer
   x = 6,216.25