Finding the Fourth Proportional to 2,724.16, 4,089.12 and 1,264.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,724.16 : 4,089.12 = 1,264.72 : x
2. Step 2: Convert to fraction form
   2,724.16/4,089.12 = 1,264.72/x
3. Step 3: Cross multiply
   2,724.16x = 4,089.12 × 1,264.72
4. Step 4: Simplify right side
   2,724.16x = 5,171,591.85
5. Step 5: Solve for x
   x = 5,171,591.85/2,724.16
6. Step 6: Final answer
   x = 1,898.42