Finding the Fourth Proportional to 2,705.70, 4,056.55 and 1,061.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,705.70 : 4,056.55 = 1,061.40 : x
2. Step 2: Convert to fraction form
   2,705.70/4,056.55 = 1,061.40/x
3. Step 3: Cross multiply
   2,705.70x = 4,056.55 × 1,061.40
4. Step 4: Simplify right side
   2,705.70x = 4,305,619.52
5. Step 5: Solve for x
   x = 4,305,619.52/2,705.70
6. Step 6: Final answer
   x = 1,591.31