Finding the Fourth Proportional to 3,321.22, 4,981.78 and 1,012.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,321.22 : 4,981.78 = 1,012.72 : x
2. Step 2: Convert to fraction form
   3,321.22/4,981.78 = 1,012.72/x
3. Step 3: Cross multiply
   3,321.22x = 4,981.78 × 1,012.72
4. Step 4: Simplify right side
   3,321.22x = 5,045,148.24
5. Step 5: Solve for x
   x = 5,045,148.24/3,321.22
6. Step 6: Final answer
   x = 1,519.06