Finding the Fourth Proportional to 2,742.12, 4,108.32 and 1,440.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,742.12 : 4,108.32 = 1,440.72 : x
2. Step 2: Convert to fraction form
   2,742.12/4,108.32 = 1,440.72/x
3. Step 3: Cross multiply
   2,742.12x = 4,108.32 × 1,440.72
4. Step 4: Simplify right side
   2,742.12x = 5,918,938.79
5. Step 5: Solve for x
   x = 5,918,938.79/2,742.12
6. Step 6: Final answer
   x = 2,158.53