Finding the Fourth Proportional to 7,109.32, 9,810.88 and 3,965.72

Step by Step Solution

1. Step 1: Write the proportion equation
   7,109.32 : 9,810.88 = 3,965.72 : x
2. Step 2: Convert to fraction form
   7,109.32/9,810.88 = 3,965.72/x
3. Step 3: Cross multiply
   7,109.32x = 9,810.88 × 3,965.72
4. Step 4: Simplify right side
   7,109.32x = 38,907,203.03
5. Step 5: Solve for x
   x = 38,907,203.03/7,109.32
6. Step 6: Final answer
   x = 5,472.70