Finding the Fourth Proportional to 2,011.83, 2,776.34 and 1,215.19

Step by Step Solution

1. Step 1: Write the proportion equation
   2,011.83 : 2,776.34 = 1,215.19 : x
2. Step 2: Convert to fraction form
   2,011.83/2,776.34 = 1,215.19/x
3. Step 3: Cross multiply
   2,011.83x = 2,776.34 × 1,215.19
4. Step 4: Simplify right side
   2,011.83x = 3,373,780.60
5. Step 5: Solve for x
   x = 3,373,780.60/2,011.83
6. Step 6: Final answer
   x = 1,676.97