Finding the Fourth Proportional to 5,142.78, 7,097.01 and 2,905.38

Step by Step Solution

1. Step 1: Write the proportion equation
   5,142.78 : 7,097.01 = 2,905.38 : x
2. Step 2: Convert to fraction form
   5,142.78/7,097.01 = 2,905.38/x
3. Step 3: Cross multiply
   5,142.78x = 7,097.01 × 2,905.38
4. Step 4: Simplify right side
   5,142.78x = 20,619,500.02
5. Step 5: Solve for x
   x = 20,619,500.02/5,142.78
6. Step 6: Final answer
   x = 4,009.41