Finding the Fourth Proportional to 10,608.98, 15,915.96 and 3,213.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,608.98 : 15,915.96 = 3,213.50 : x
2. Step 2: Convert to fraction form
   10,608.98/15,915.96 = 3,213.50/x
3. Step 3: Cross multiply
   10,608.98x = 15,915.96 × 3,213.50
4. Step 4: Simplify right side
   10,608.98x = 51,145,857.88
5. Step 5: Solve for x
   x = 51,145,857.88/10,608.98
6. Step 6: Final answer
   x = 4,821.00