Finding the Fourth Proportional to 3,997.99, 5,516.89 and 2,318.86

Step by Step Solution

1. Step 1: Write the proportion equation
   3,997.99 : 5,516.89 = 2,318.86 : x
2. Step 2: Convert to fraction form
   3,997.99/5,516.89 = 2,318.86/x
3. Step 3: Cross multiply
   3,997.99x = 5,516.89 × 2,318.86
4. Step 4: Simplify right side
   3,997.99x = 12,792,867.96
5. Step 5: Solve for x
   x = 12,792,867.96/3,997.99
6. Step 6: Final answer
   x = 3,199.83