Finding the Fourth Proportional to 2,080.84, 3,121.28 and 926.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,080.84 : 3,121.28 = 926.52 : x
2. Step 2: Convert to fraction form
   2,080.84/3,121.28 = 926.52/x
3. Step 3: Cross multiply
   2,080.84x = 3,121.28 × 926.52
4. Step 4: Simplify right side
   2,080.84x = 2,891,928.35
5. Step 5: Solve for x
   x = 2,891,928.35/2,080.84
6. Step 6: Final answer
   x = 1,389.79