Finding the Fourth Proportional to 7,155.72, 9,875.46 and 3,969.33

Step by Step Solution

1. Step 1: Write the proportion equation
   7,155.72 : 9,875.46 = 3,969.33 : x
2. Step 2: Convert to fraction form
   7,155.72/9,875.46 = 3,969.33/x
3. Step 3: Cross multiply
   7,155.72x = 9,875.46 × 3,969.33
4. Step 4: Simplify right side
   7,155.72x = 39,198,959.64
5. Step 5: Solve for x
   x = 39,198,959.64/7,155.72
6. Step 6: Final answer
   x = 5,477.99