Finding the Fourth Proportional to 10,427.38, 14,389.78 and 5,711.67

Step by Step Solution

1. Step 1: Write the proportion equation
   10,427.38 : 14,389.78 = 5,711.67 : x
2. Step 2: Convert to fraction form
   10,427.38/14,389.78 = 5,711.67/x
3. Step 3: Cross multiply
   10,427.38x = 14,389.78 × 5,711.67
4. Step 4: Simplify right side
   10,427.38x = 82,189,646.17
5. Step 5: Solve for x
   x = 82,189,646.17/10,427.38
6. Step 6: Final answer
   x = 7,882.10