Finding the Fourth Proportional to 7,109.30, 10,662.72 and 3,212.80

Step by Step Solution

1. Step 1: Write the proportion equation
   7,109.30 : 10,662.72 = 3,212.80 : x
2. Step 2: Convert to fraction form
   7,109.30/10,662.72 = 3,212.80/x
3. Step 3: Cross multiply
   7,109.30x = 10,662.72 × 3,212.80
4. Step 4: Simplify right side
   7,109.30x = 34,257,186.82
5. Step 5: Solve for x
   x = 34,257,186.82/7,109.30
6. Step 6: Final answer
   x = 4,818.64