Finding the Fourth Proportional to 7,105.30, 10,656.72 and 3,208.80

Step by Step Solution

1. Step 1: Write the proportion equation
   7,105.30 : 10,656.72 = 3,208.80 : x
2. Step 2: Convert to fraction form
   7,105.30/10,656.72 = 3,208.80/x
3. Step 3: Cross multiply
   7,105.30x = 10,656.72 × 3,208.80
4. Step 4: Simplify right side
   7,105.30x = 34,195,283.14
5. Step 5: Solve for x
   x = 34,195,283.14/7,105.30
6. Step 6: Final answer
   x = 4,812.64