Finding the Fourth Proportional to 2,570.76, 3,855.54 and 722.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,570.76 : 3,855.54 = 722.05 : x
2. Step 2: Convert to fraction form
   2,570.76/3,855.54 = 722.05/x
3. Step 3: Cross multiply
   2,570.76x = 3,855.54 × 722.05
4. Step 4: Simplify right side
   2,570.76x = 2,783,889.05
5. Step 5: Solve for x
   x = 2,783,889.05/2,570.76
6. Step 6: Final answer
   x = 1,082.91