Finding the Fourth Proportional to 6,572.08, 9,860.28 and 3,111.76

Step by Step Solution

1. Step 1: Write the proportion equation
   6,572.08 : 9,860.28 = 3,111.76 : x
2. Step 2: Convert to fraction form
   6,572.08/9,860.28 = 3,111.76/x
3. Step 3: Cross multiply
   6,572.08x = 9,860.28 × 3,111.76
4. Step 4: Simplify right side
   6,572.08x = 30,682,824.89
5. Step 5: Solve for x
   x = 30,682,824.89/6,572.08
6. Step 6: Final answer
   x = 4,668.66