Finding the Fourth Proportional to 5,123.89, 7,072.12 and 3,354.47

Step by Step Solution

1. Step 1: Write the proportion equation
   5,123.89 : 7,072.12 = 3,354.47 : x
2. Step 2: Convert to fraction form
   5,123.89/7,072.12 = 3,354.47/x
3. Step 3: Cross multiply
   5,123.89x = 7,072.12 × 3,354.47
4. Step 4: Simplify right side
   5,123.89x = 23,723,209.73
5. Step 5: Solve for x
   x = 23,723,209.73/5,123.89
6. Step 6: Final answer
   x = 4,629.92