Finding the Fourth Proportional to 3,980.66, 5,971.94 and 3,914.55

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.66 : 5,971.94 = 3,914.55 : x
2. Step 2: Convert to fraction form
   3,980.66/5,971.94 = 3,914.55/x
3. Step 3: Cross multiply
   3,980.66x = 5,971.94 × 3,914.55
4. Step 4: Simplify right side
   3,980.66x = 23,377,457.73
5. Step 5: Solve for x
   x = 23,377,457.73/3,980.66
6. Step 6: Final answer
   x = 5,872.76