Finding the Fourth Proportional to 7,109.16, 9,810.71 and 3,965.55

Step by Step Solution

1. Step 1: Write the proportion equation
   7,109.16 : 9,810.71 = 3,965.55 : x
2. Step 2: Convert to fraction form
   7,109.16/9,810.71 = 3,965.55/x
3. Step 3: Cross multiply
   7,109.16x = 9,810.71 × 3,965.55
4. Step 4: Simplify right side
   7,109.16x = 38,904,861.04
5. Step 5: Solve for x
   x = 38,904,861.04/7,109.16
6. Step 6: Final answer
   x = 5,472.50