Finding the Fourth Proportional to 2,664.72, 3,996.72 and 1,366.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,664.72 : 3,996.72 = 1,366.20 : x
2. Step 2: Convert to fraction form
   2,664.72/3,996.72 = 1,366.20/x
3. Step 3: Cross multiply
   2,664.72x = 3,996.72 × 1,366.20
4. Step 4: Simplify right side
   2,664.72x = 5,460,318.86
5. Step 5: Solve for x
   x = 5,460,318.86/2,664.72
6. Step 6: Final answer
   x = 2,049.12