Finding the Fourth Proportional to 2,720.78, 3,755.28 and 1,542.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,720.78 : 3,755.28 = 1,542.50 : x
2. Step 2: Convert to fraction form
   2,720.78/3,755.28 = 1,542.50/x
3. Step 3: Cross multiply
   2,720.78x = 3,755.28 × 1,542.50
4. Step 4: Simplify right side
   2,720.78x = 5,792,519.40
5. Step 5: Solve for x
   x = 5,792,519.40/2,720.78
6. Step 6: Final answer
   x = 2,128.99