Finding the Fourth Proportional to 3,997.16, 5,515.98 and 2,318.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,997.16 : 5,515.98 = 2,318.72 : x
2. Step 2: Convert to fraction form
   3,997.16/5,515.98 = 2,318.72/x
3. Step 3: Cross multiply
   3,997.16x = 5,515.98 × 2,318.72
4. Step 4: Simplify right side
   3,997.16x = 12,789,985.57
5. Step 5: Solve for x
   x = 12,789,985.57/3,997.16
6. Step 6: Final answer
   x = 3,199.77