Finding the Fourth Proportional to 5,568.47, 7,679.71 and 3,972.07

Step by Step Solution

1. Step 1: Write the proportion equation
   5,568.47 : 7,679.71 = 3,972.07 : x
2. Step 2: Convert to fraction form
   5,568.47/7,679.71 = 3,972.07/x
3. Step 3: Cross multiply
   5,568.47x = 7,679.71 × 3,972.07
4. Step 4: Simplify right side
   5,568.47x = 30,504,345.70
5. Step 5: Solve for x
   x = 30,504,345.70/5,568.47
6. Step 6: Final answer
   x = 5,478.05