Finding the Fourth Proportional to 5,161.78, 7,123.31 and 2,923.62

Step by Step Solution

1. Step 1: Write the proportion equation
   5,161.78 : 7,123.31 = 2,923.62 : x
2. Step 2: Convert to fraction form
   5,161.78/7,123.31 = 2,923.62/x
3. Step 3: Cross multiply
   5,161.78x = 7,123.31 × 2,923.62
4. Step 4: Simplify right side
   5,161.78x = 20,825,851.58
5. Step 5: Solve for x
   x = 20,825,851.58/5,161.78
6. Step 6: Final answer
   x = 4,034.63