Finding the Fourth Proportional to 5,066.72, 7,005.12 and 3,891.68

Step by Step Solution

1. Step 1: Write the proportion equation
   5,066.72 : 7,005.12 = 3,891.68 : x
2. Step 2: Convert to fraction form
   5,066.72/7,005.12 = 3,891.68/x
3. Step 3: Cross multiply
   5,066.72x = 7,005.12 × 3,891.68
4. Step 4: Simplify right side
   5,066.72x = 27,261,685.40
5. Step 5: Solve for x
   x = 27,261,685.40/5,066.72
6. Step 6: Final answer
   x = 5,380.54