Finding the Fourth Proportional to 10,428.96, 14,391.36 and 5,712.42

Step by Step Solution

1. Step 1: Write the proportion equation
   10,428.96 : 14,391.36 = 5,712.42 : x
2. Step 2: Convert to fraction form
   10,428.96/14,391.36 = 5,712.42/x
3. Step 3: Cross multiply
   10,428.96x = 14,391.36 × 5,712.42
4. Step 4: Simplify right side
   10,428.96x = 82,209,492.69
5. Step 5: Solve for x
   x = 82,209,492.69/10,428.96
6. Step 6: Final answer
   x = 7,882.81