Finding the Fourth Proportional to 2,054.56, 3,080.89 and 820.93

Step by Step Solution

1. Step 1: Write the proportion equation
   2,054.56 : 3,080.89 = 820.93 : x
2. Step 2: Convert to fraction form
   2,054.56/3,080.89 = 820.93/x
3. Step 3: Cross multiply
   2,054.56x = 3,080.89 × 820.93
4. Step 4: Simplify right side
   2,054.56x = 2,529,177.57
5. Step 5: Solve for x
   x = 2,529,177.57/2,054.56
6. Step 6: Final answer
   x = 1,231.01