Finding the Fourth Proportional to 2,080.50, 3,123.15 and 1,056.66

Step by Step Solution

1. Step 1: Write the proportion equation
   2,080.50 : 3,123.15 = 1,056.66 : x
2. Step 2: Convert to fraction form
   2,080.50/3,123.15 = 1,056.66/x
3. Step 3: Cross multiply
   2,080.50x = 3,123.15 × 1,056.66
4. Step 4: Simplify right side
   2,080.50x = 3,300,107.68
5. Step 5: Solve for x
   x = 3,300,107.68/2,080.50
6. Step 6: Final answer
   x = 1,586.21