Finding the Fourth Proportional to 6,820.16, 10,226.56 and 3,118.20

Step by Step Solution

1. Step 1: Write the proportion equation
   6,820.16 : 10,226.56 = 3,118.20 : x
2. Step 2: Convert to fraction form
   6,820.16/10,226.56 = 3,118.20/x
3. Step 3: Cross multiply
   6,820.16x = 10,226.56 × 3,118.20
4. Step 4: Simplify right side
   6,820.16x = 31,888,459.39
5. Step 5: Solve for x
   x = 31,888,459.39/6,820.16
6. Step 6: Final answer
   x = 4,675.62