Finding the Fourth Proportional to 10,640.87, 15,963.20 and 3,620.52

Step by Step Solution

1. Step 1: Write the proportion equation
   10,640.87 : 15,963.20 = 3,620.52 : x
2. Step 2: Convert to fraction form
   10,640.87/15,963.20 = 3,620.52/x
3. Step 3: Cross multiply
   10,640.87x = 15,963.20 × 3,620.52
4. Step 4: Simplify right side
   10,640.87x = 57,795,084.86
5. Step 5: Solve for x
   x = 57,795,084.86/10,640.87
6. Step 6: Final answer
   x = 5,431.42