Finding the Fourth Proportional to 7,728.42, 10,665.18 and 4,191.69

Step by Step Solution

1. Step 1: Write the proportion equation
   7,728.42 : 10,665.18 = 4,191.69 : x
2. Step 2: Convert to fraction form
   7,728.42/10,665.18 = 4,191.69/x
3. Step 3: Cross multiply
   7,728.42x = 10,665.18 × 4,191.69
4. Step 4: Simplify right side
   7,728.42x = 44,705,128.35
5. Step 5: Solve for x
   x = 44,705,128.35/7,728.42
6. Step 6: Final answer
   x = 5,784.51