Finding the Fourth Proportional to 2,718.56, 3,751.72 and 1,539.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,718.56 : 3,751.72 = 1,539.61 : x
2. Step 2: Convert to fraction form
   2,718.56/3,751.72 = 1,539.61/x
3. Step 3: Cross multiply
   2,718.56x = 3,751.72 × 1,539.61
4. Step 4: Simplify right side
   2,718.56x = 5,776,172.40
5. Step 5: Solve for x
   x = 5,776,172.40/2,718.56
6. Step 6: Final answer
   x = 2,124.72