Finding the Fourth Proportional to 2,019.72, 3,031.76 and 1,445.16

Step by Step Solution

1. Step 1: Write the proportion equation
   2,019.72 : 3,031.76 = 1,445.16 : x
2. Step 2: Convert to fraction form
   2,019.72/3,031.76 = 1,445.16/x
3. Step 3: Cross multiply
   2,019.72x = 3,031.76 × 1,445.16
4. Step 4: Simplify right side
   2,019.72x = 4,381,378.28
5. Step 5: Solve for x
   x = 4,381,378.28/2,019.72
6. Step 6: Final answer
   x = 2,169.30