Finding the Fourth Proportional to 5,381.22, 7,424.78 and 4,123.56

Step by Step Solution

1. Step 1: Write the proportion equation
   5,381.22 : 7,424.78 = 4,123.56 : x
2. Step 2: Convert to fraction form
   5,381.22/7,424.78 = 4,123.56/x
3. Step 3: Cross multiply
   5,381.22x = 7,424.78 × 4,123.56
4. Step 4: Simplify right side
   5,381.22x = 30,616,525.82
5. Step 5: Solve for x
   x = 30,616,525.82/5,381.22
6. Step 6: Final answer
   x = 5,689.51