Finding the Fourth Proportional to 1,705.56, 2,560.12 and 1,511.80

Step by Step Solution

1. Step 1: Write the proportion equation
   1,705.56 : 2,560.12 = 1,511.80 : x
2. Step 2: Convert to fraction form
   1,705.56/2,560.12 = 1,511.80/x
3. Step 3: Cross multiply
   1,705.56x = 2,560.12 × 1,511.80
4. Step 4: Simplify right side
   1,705.56x = 3,870,389.42
5. Step 5: Solve for x
   x = 3,870,389.42/1,705.56
6. Step 6: Final answer
   x = 2,269.28