Finding the Fourth Proportional to 10,428.42, 14,391.27 and 5,712.69

Step by Step Solution

1. Step 1: Write the proportion equation
   10,428.42 : 14,391.27 = 5,712.69 : x
2. Step 2: Convert to fraction form
   10,428.42/14,391.27 = 5,712.69/x
3. Step 3: Cross multiply
   10,428.42x = 14,391.27 × 5,712.69
4. Step 4: Simplify right side
   10,428.42x = 82,212,835.65
5. Step 5: Solve for x
   x = 82,212,835.65/10,428.42
6. Step 6: Final answer
   x = 7,883.54