Finding the Fourth Proportional to 3,983.64, 5,978.04 and 2,111.25

Step by Step Solution

1. Step 1: Write the proportion equation
   3,983.64 : 5,978.04 = 2,111.25 : x
2. Step 2: Convert to fraction form
   3,983.64/5,978.04 = 2,111.25/x
3. Step 3: Cross multiply
   3,983.64x = 5,978.04 × 2,111.25
4. Step 4: Simplify right side
   3,983.64x = 12,621,151.45
5. Step 5: Solve for x
   x = 12,621,151.45/3,983.64
6. Step 6: Final answer
   x = 3,168.25