Finding the Fourth Proportional to 2,054.28, 3,080.28 and 1,011.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,054.28 : 3,080.28 = 1,011.99 : x
2. Step 2: Convert to fraction form
   2,054.28/3,080.28 = 1,011.99/x
3. Step 3: Cross multiply
   2,054.28x = 3,080.28 × 1,011.99
4. Step 4: Simplify right side
   2,054.28x = 3,117,212.56
5. Step 5: Solve for x
   x = 3,117,212.56/2,054.28
6. Step 6: Final answer
   x = 1,517.42