Finding the Fourth Proportional to 2,703.20, 3,725.92 and 2,142.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,703.20 : 3,725.92 = 2,142.72 : x
2. Step 2: Convert to fraction form
   2,703.20/3,725.92 = 2,142.72/x
3. Step 3: Cross multiply
   2,703.20x = 3,725.92 × 2,142.72
4. Step 4: Simplify right side
   2,703.20x = 7,983,603.30
5. Step 5: Solve for x
   x = 7,983,603.30/2,703.20
6. Step 6: Final answer
   x = 2,953.39