Finding the Fourth Proportional to 5,076.42, 7,005.72 and 3,086.65

Step by Step Solution

1. Step 1: Write the proportion equation
   5,076.42 : 7,005.72 = 3,086.65 : x
2. Step 2: Convert to fraction form
   5,076.42/7,005.72 = 3,086.65/x
3. Step 3: Cross multiply
   5,076.42x = 7,005.72 × 3,086.65
4. Step 4: Simplify right side
   5,076.42x = 21,624,205.64
5. Step 5: Solve for x
   x = 21,624,205.64/5,076.42
6. Step 6: Final answer
   x = 4,259.74