Finding the Fourth Proportional to 10,428.63, 14,391.50 and 5,712.92

Step by Step Solution

1. Step 1: Write the proportion equation
   10,428.63 : 14,391.50 = 5,712.92 : x
2. Step 2: Convert to fraction form
   10,428.63/14,391.50 = 5,712.92/x
3. Step 3: Cross multiply
   10,428.63x = 14,391.50 × 5,712.92
4. Step 4: Simplify right side
   10,428.63x = 82,217,488.18
5. Step 5: Solve for x
   x = 82,217,488.18/10,428.63
6. Step 6: Final answer
   x = 7,883.82