Finding the Fourth Proportional to 10,428.54, 14,391.58 and 5,712.52

Step by Step Solution

1. Step 1: Write the proportion equation
   10,428.54 : 14,391.58 = 5,712.52 : x
2. Step 2: Convert to fraction form
   10,428.54/14,391.58 = 5,712.52/x
3. Step 3: Cross multiply
   10,428.54x = 14,391.58 × 5,712.52
4. Step 4: Simplify right side
   10,428.54x = 82,212,188.58
5. Step 5: Solve for x
   x = 82,212,188.58/10,428.54
6. Step 6: Final answer
   x = 7,883.38