Finding the Fourth Proportional to 5,123.57, 7,685.33 and 2,930.75

Step by Step Solution

1. Step 1: Write the proportion equation
   5,123.57 : 7,685.33 = 2,930.75 : x
2. Step 2: Convert to fraction form
   5,123.57/7,685.33 = 2,930.75/x
3. Step 3: Cross multiply
   5,123.57x = 7,685.33 × 2,930.75
4. Step 4: Simplify right side
   5,123.57x = 22,523,727.82
5. Step 5: Solve for x
   x = 22,523,727.82/5,123.57
6. Step 6: Final answer
   x = 4,396.10