Finding the Fourth Proportional to 10,640.61, 15,962.82 and 3,620.27

Step by Step Solution

1. Step 1: Write the proportion equation
   10,640.61 : 15,962.82 = 3,620.27 : x
2. Step 2: Convert to fraction form
   10,640.61/15,962.82 = 3,620.27/x
3. Step 3: Cross multiply
   10,640.61x = 15,962.82 × 3,620.27
4. Step 4: Simplify right side
   10,640.61x = 57,789,718.36
5. Step 5: Solve for x
   x = 57,789,718.36/10,640.61
6. Step 6: Final answer
   x = 5,431.05