Finding the Fourth Proportional to 5,123.94, 7,680.37 and 2,485.87

Step by Step Solution

1. Step 1: Write the proportion equation
   5,123.94 : 7,680.37 = 2,485.87 : x
2. Step 2: Convert to fraction form
   5,123.94/7,680.37 = 2,485.87/x
3. Step 3: Cross multiply
   5,123.94x = 7,680.37 × 2,485.87
4. Step 4: Simplify right side
   5,123.94x = 19,092,401.37
5. Step 5: Solve for x
   x = 19,092,401.37/5,123.94
6. Step 6: Final answer
   x = 3,726.12