Finding the Fourth Proportional to 5,123.05, 7,684.12 and 1,425.20

Step by Step Solution

1. Step 1: Write the proportion equation
   5,123.05 : 7,684.12 = 1,425.20 : x
2. Step 2: Convert to fraction form
   5,123.05/7,684.12 = 1,425.20/x
3. Step 3: Cross multiply
   5,123.05x = 7,684.12 × 1,425.20
4. Step 4: Simplify right side
   5,123.05x = 10,951,363.17
5. Step 5: Solve for x
   x = 10,951,363.17/5,123.05
6. Step 6: Final answer
   x = 2,137.67