Finding the Fourth Proportional to 2,080.84, 3,120.30 and 926.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,080.84 : 3,120.30 = 926.56 : x
2. Step 2: Convert to fraction form
   2,080.84/3,120.30 = 926.56/x
3. Step 3: Cross multiply
   2,080.84x = 3,120.30 × 926.56
4. Step 4: Simplify right side
   2,080.84x = 2,891,145.17
5. Step 5: Solve for x
   x = 2,891,145.17/2,080.84
6. Step 6: Final answer
   x = 1,389.41