Finding the Fourth Proportional to 2,776.55, 4,162.17 and 1,021.15

Step by Step Solution

1. Step 1: Write the proportion equation
   2,776.55 : 4,162.17 = 1,021.15 : x
2. Step 2: Convert to fraction form
   2,776.55/4,162.17 = 1,021.15/x
3. Step 3: Cross multiply
   2,776.55x = 4,162.17 × 1,021.15
4. Step 4: Simplify right side
   2,776.55x = 4,250,179.08
5. Step 5: Solve for x
   x = 4,250,179.08/2,776.55
6. Step 6: Final answer
   x = 1,530.74