Finding the Fourth Proportional to 5,123.78, 7,073.48 and 3,453.96

Step by Step Solution

1. Step 1: Write the proportion equation
   5,123.78 : 7,073.48 = 3,453.96 : x
2. Step 2: Convert to fraction form
   5,123.78/7,073.48 = 3,453.96/x
3. Step 3: Cross multiply
   5,123.78x = 7,073.48 × 3,453.96
4. Step 4: Simplify right side
   5,123.78x = 24,431,499.71
5. Step 5: Solve for x
   x = 24,431,499.71/5,123.78
6. Step 6: Final answer
   x = 4,768.26