Finding the Fourth Proportional to 5,388.54, 7,440.86 and 3,974.69

Step by Step Solution

1. Step 1: Write the proportion equation
   5,388.54 : 7,440.86 = 3,974.69 : x
2. Step 2: Convert to fraction form
   5,388.54/7,440.86 = 3,974.69/x
3. Step 3: Cross multiply
   5,388.54x = 7,440.86 × 3,974.69
4. Step 4: Simplify right side
   5,388.54x = 29,575,084.57
5. Step 5: Solve for x
   x = 29,575,084.57/5,388.54
6. Step 6: Final answer
   x = 5,488.52