Finding the Fourth Proportional to 2,011.97, 2,776.59 and 1,173.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,011.97 : 2,776.59 = 1,173.21 : x
2. Step 2: Convert to fraction form
   2,011.97/2,776.59 = 1,173.21/x
3. Step 3: Cross multiply
   2,011.97x = 2,776.59 × 1,173.21
4. Step 4: Simplify right side
   2,011.97x = 3,257,523.15
5. Step 5: Solve for x
   x = 3,257,523.15/2,011.97
6. Step 6: Final answer
   x = 1,619.08