Finding the Fourth Proportional to 2,705.30, 4,057.49 and 757.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,705.30 : 4,057.49 = 757.05 : x
2. Step 2: Convert to fraction form
   2,705.30/4,057.49 = 757.05/x
3. Step 3: Cross multiply
   2,705.30x = 4,057.49 × 757.05
4. Step 4: Simplify right side
   2,705.30x = 3,071,722.80
5. Step 5: Solve for x
   x = 3,071,722.80/2,705.30
6. Step 6: Final answer
   x = 1,135.45