Finding the Fourth Proportional to 4,935.78, 7,397.46 and 2,160.72

Step by Step Solution

1. Step 1: Write the proportion equation
   4,935.78 : 7,397.46 = 2,160.72 : x
2. Step 2: Convert to fraction form
   4,935.78/7,397.46 = 2,160.72/x
3. Step 3: Cross multiply
   4,935.78x = 7,397.46 × 2,160.72
4. Step 4: Simplify right side
   4,935.78x = 15,983,839.77
5. Step 5: Solve for x
   x = 15,983,839.77/4,935.78
6. Step 6: Final answer
   x = 3,238.36