Finding the Fourth Proportional to 3,977.91, 5,970.51 and 2,105.46

Step by Step Solution

1. Step 1: Write the proportion equation
   3,977.91 : 5,970.51 = 2,105.46 : x
2. Step 2: Convert to fraction form
   3,977.91/5,970.51 = 2,105.46/x
3. Step 3: Cross multiply
   3,977.91x = 5,970.51 × 2,105.46
4. Step 4: Simplify right side
   3,977.91x = 12,570,669.98
5. Step 5: Solve for x
   x = 12,570,669.98/3,977.91
6. Step 6: Final answer
   x = 3,160.12