Finding the Fourth Proportional to 2,056.62, 3,085.20 and 1,082.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,056.62 : 3,085.20 = 1,082.78 : x
2. Step 2: Convert to fraction form
   2,056.62/3,085.20 = 1,082.78/x
3. Step 3: Cross multiply
   2,056.62x = 3,085.20 × 1,082.78
4. Step 4: Simplify right side
   2,056.62x = 3,340,592.86
5. Step 5: Solve for x
   x = 3,340,592.86/2,056.62
6. Step 6: Final answer
   x = 1,624.31