Finding the Fourth Proportional to 2,011.56, 2,776.04 and 1,115.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,011.56 : 2,776.04 = 1,115.28 : x
2. Step 2: Convert to fraction form
   2,011.56/2,776.04 = 1,115.28/x
3. Step 3: Cross multiply
   2,011.56x = 2,776.04 × 1,115.28
4. Step 4: Simplify right side
   2,011.56x = 3,096,061.89
5. Step 5: Solve for x
   x = 3,096,061.89/2,011.56
6. Step 6: Final answer
   x = 1,539.13