Finding the Fourth Proportional to 10,456.50, 15,684.62 and 2,665.22

Step by Step Solution

1. Step 1: Write the proportion equation
   10,456.50 : 15,684.62 = 2,665.22 : x
2. Step 2: Convert to fraction form
   10,456.50/15,684.62 = 2,665.22/x
3. Step 3: Cross multiply
   10,456.50x = 15,684.62 × 2,665.22
4. Step 4: Simplify right side
   10,456.50x = 41,802,962.92
5. Step 5: Solve for x
   x = 41,802,962.92/10,456.50
6. Step 6: Final answer
   x = 3,997.80