Finding the Fourth Proportional to 5,123.78, 7,667.38 and 3,719.82

Step by Step Solution

1. Step 1: Write the proportion equation
   5,123.78 : 7,667.38 = 3,719.82 : x
2. Step 2: Convert to fraction form
   5,123.78/7,667.38 = 3,719.82/x
3. Step 3: Cross multiply
   5,123.78x = 7,667.38 × 3,719.82
4. Step 4: Simplify right side
   5,123.78x = 28,521,306.87
5. Step 5: Solve for x
   x = 28,521,306.87/5,123.78
6. Step 6: Final answer
   x = 5,566.46