Finding the Fourth Proportional to 3,997.10, 5,984.35 and 2,118.71

Step by Step Solution

1. Step 1: Write the proportion equation
   3,997.10 : 5,984.35 = 2,118.71 : x
2. Step 2: Convert to fraction form
   3,997.10/5,984.35 = 2,118.71/x
3. Step 3: Cross multiply
   3,997.10x = 5,984.35 × 2,118.71
4. Step 4: Simplify right side
   3,997.10x = 12,679,111.85
5. Step 5: Solve for x
   x = 12,679,111.85/3,997.10
6. Step 6: Final answer
   x = 3,172.08