Finding the Fourth Proportional to 3,997.95, 5,517.05 and 2,180.91

Step by Step Solution

1. Step 1: Write the proportion equation
   3,997.95 : 5,517.05 = 2,180.91 : x
2. Step 2: Convert to fraction form
   3,997.95/5,517.05 = 2,180.91/x
3. Step 3: Cross multiply
   3,997.95x = 5,517.05 × 2,180.91
4. Step 4: Simplify right side
   3,997.95x = 12,032,151.03
5. Step 5: Solve for x
   x = 12,032,151.03/3,997.95
6. Step 6: Final answer
   x = 3,009.58