Finding the Fourth Proportional to 10,427.16, 14,389.47 and 5,711.61

Step by Step Solution

1. Step 1: Write the proportion equation
   10,427.16 : 14,389.47 = 5,711.61 : x
2. Step 2: Convert to fraction form
   10,427.16/14,389.47 = 5,711.61/x
3. Step 3: Cross multiply
   10,427.16x = 14,389.47 × 5,711.61
4. Step 4: Simplify right side
   10,427.16x = 82,187,040.75
5. Step 5: Solve for x
   x = 82,187,040.75/10,427.16
6. Step 6: Final answer
   x = 7,882.02