Finding the Fourth Proportional to 10,567.67, 15,846.71 and 3,989.18

Step by Step Solution

1. Step 1: Write the proportion equation
   10,567.67 : 15,846.71 = 3,989.18 : x
2. Step 2: Convert to fraction form
   10,567.67/15,846.71 = 3,989.18/x
3. Step 3: Cross multiply
   10,567.67x = 15,846.71 × 3,989.18
4. Step 4: Simplify right side
   10,567.67x = 63,215,398.27
5. Step 5: Solve for x
   x = 63,215,398.27/10,567.67
6. Step 6: Final answer
   x = 5,981.96