Finding the Fourth Proportional to 3,980.96, 5,981.20 and 3,759.92

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.96 : 5,981.20 = 3,759.92 : x
2. Step 2: Convert to fraction form
   3,980.96/5,981.20 = 3,759.92/x
3. Step 3: Cross multiply
   3,980.96x = 5,981.20 × 3,759.92
4. Step 4: Simplify right side
   3,980.96x = 22,488,833.50
5. Step 5: Solve for x
   x = 22,488,833.50/3,980.96
6. Step 6: Final answer
   x = 5,649.10