Finding the Fourth Proportional to 6,645.50, 9,969.89 and 1,965.48

Step by Step Solution

1. Step 1: Write the proportion equation
   6,645.50 : 9,969.89 = 1,965.48 : x
2. Step 2: Convert to fraction form
   6,645.50/9,969.89 = 1,965.48/x
3. Step 3: Cross multiply
   6,645.50x = 9,969.89 × 1,965.48
4. Step 4: Simplify right side
   6,645.50x = 19,595,609.57
5. Step 5: Solve for x
   x = 19,595,609.57/6,645.50
6. Step 6: Final answer
   x = 2,948.71