Finding the Fourth Proportional to 5,178.88, 7,146.61 and 2,940.46

Step by Step Solution

1. Step 1: Write the proportion equation
   5,178.88 : 7,146.61 = 2,940.46 : x
2. Step 2: Convert to fraction form
   5,178.88/7,146.61 = 2,940.46/x
3. Step 3: Cross multiply
   5,178.88x = 7,146.61 × 2,940.46
4. Step 4: Simplify right side
   5,178.88x = 21,014,322.42
5. Step 5: Solve for x
   x = 21,014,322.42/5,178.88
6. Step 6: Final answer
   x = 4,057.70