Finding the Fourth Proportional to 7,728.69, 10,665.61 and 4,191.92

Step by Step Solution

1. Step 1: Write the proportion equation
   7,728.69 : 10,665.61 = 4,191.92 : x
2. Step 2: Convert to fraction form
   7,728.69/10,665.61 = 4,191.92/x
3. Step 3: Cross multiply
   7,728.69x = 10,665.61 × 4,191.92
4. Step 4: Simplify right side
   7,728.69x = 44,709,320.06
5. Step 5: Solve for x
   x = 44,709,320.06/7,728.69
6. Step 6: Final answer
   x = 5,784.85