Finding the Fourth Proportional to 2,981.72, 4,458.35 and 2,720.31

Step by Step Solution

1. Step 1: Write the proportion equation
   2,981.72 : 4,458.35 = 2,720.31 : x
2. Step 2: Convert to fraction form
   2,981.72/4,458.35 = 2,720.31/x
3. Step 3: Cross multiply
   2,981.72x = 4,458.35 × 2,720.31
4. Step 4: Simplify right side
   2,981.72x = 12,128,080.49
5. Step 5: Solve for x
   x = 12,128,080.49/2,981.72
6. Step 6: Final answer
   x = 4,067.48