Finding the Fourth Proportional to 3,980.24, 5,971.32 and 1,928.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,980.24 : 5,971.32 = 1,928.72 : x
2. Step 2: Convert to fraction form
   3,980.24/5,971.32 = 1,928.72/x
3. Step 3: Cross multiply
   3,980.24x = 5,971.32 × 1,928.72
4. Step 4: Simplify right side
   3,980.24x = 11,517,004.31
5. Step 5: Solve for x
   x = 11,517,004.31/3,980.24
6. Step 6: Final answer
   x = 2,893.55