Finding the Fourth Proportional to 2,742.72, 3,782.04 and 2,520.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,742.72 : 3,782.04 = 2,520.78 : x
2. Step 2: Convert to fraction form
   2,742.72/3,782.04 = 2,520.78/x
3. Step 3: Cross multiply
   2,742.72x = 3,782.04 × 2,520.78
4. Step 4: Simplify right side
   2,742.72x = 9,533,690.79
5. Step 5: Solve for x
   x = 9,533,690.79/2,742.72
6. Step 6: Final answer
   x = 3,476.00