Finding the Fourth Proportional to 10,812.86, 16,217.89 and 3,418.07

Step by Step Solution

1. Step 1: Write the proportion equation
   10,812.86 : 16,217.89 = 3,418.07 : x
2. Step 2: Convert to fraction form
   10,812.86/16,217.89 = 3,418.07/x
3. Step 3: Cross multiply
   10,812.86x = 16,217.89 × 3,418.07
4. Step 4: Simplify right side
   10,812.86x = 55,433,793.64
5. Step 5: Solve for x
   x = 55,433,793.64/10,812.86
6. Step 6: Final answer
   x = 5,126.66