Finding the Fourth Proportional to 3,945.53, 5,445.41 and 3,528.11

Step by Step Solution

1. Step 1: Write the proportion equation
   3,945.53 : 5,445.41 = 3,528.11 : x
2. Step 2: Convert to fraction form
   3,945.53/5,445.41 = 3,528.11/x
3. Step 3: Cross multiply
   3,945.53x = 5,445.41 × 3,528.11
4. Step 4: Simplify right side
   3,945.53x = 19,211,960.61
5. Step 5: Solve for x
   x = 19,211,960.61/3,945.53
6. Step 6: Final answer
   x = 4,869.30