Finding the Fourth Proportional to 7,665.35, 10,568.42 and 5,143.47

Step by Step Solution

1. Step 1: Write the proportion equation
   7,665.35 : 10,568.42 = 5,143.47 : x
2. Step 2: Convert to fraction form
   7,665.35/10,568.42 = 5,143.47/x
3. Step 3: Cross multiply
   7,665.35x = 10,568.42 × 5,143.47
4. Step 4: Simplify right side
   7,665.35x = 54,358,334.09
5. Step 5: Solve for x
   x = 54,358,334.09/7,665.35
6. Step 6: Final answer
   x = 7,091.43