Finding the Fourth Proportional to 7,109.64, 9,810.72 and 3,965.76

Step by Step Solution

1. Step 1: Write the proportion equation
   7,109.64 : 9,810.72 = 3,965.76 : x
2. Step 2: Convert to fraction form
   7,109.64/9,810.72 = 3,965.76/x
3. Step 3: Cross multiply
   7,109.64x = 9,810.72 × 3,965.76
4. Step 4: Simplify right side
   7,109.64x = 38,906,960.95
5. Step 5: Solve for x
   x = 38,906,960.95/7,109.64
6. Step 6: Final answer
   x = 5,472.42