Finding the Fourth Proportional to 10,605.98, 15,911.46 and 3,210.50

Step by Step Solution

1. Step 1: Write the proportion equation
   10,605.98 : 15,911.46 = 3,210.50 : x
2. Step 2: Convert to fraction form
   10,605.98/15,911.46 = 3,210.50/x
3. Step 3: Cross multiply
   10,605.98x = 15,911.46 × 3,210.50
4. Step 4: Simplify right side
   10,605.98x = 51,083,742.33
5. Step 5: Solve for x
   x = 51,083,742.33/10,605.98
6. Step 6: Final answer
   x = 4,816.50