Finding the Fourth Proportional to 6,485.16, 9,706.56 and 3,519.12

Step by Step Solution

1. Step 1: Write the proportion equation
   6,485.16 : 9,706.56 = 3,519.12 : x
2. Step 2: Convert to fraction form
   6,485.16/9,706.56 = 3,519.12/x
3. Step 3: Cross multiply
   6,485.16x = 9,706.56 × 3,519.12
4. Step 4: Simplify right side
   6,485.16x = 34,158,549.43
5. Step 5: Solve for x
   x = 34,158,549.43/6,485.16
6. Step 6: Final answer
   x = 5,267.19