Finding the Fourth Proportional to 5,256.65, 7,254.69 and 3,928.05

Step by Step Solution

1. Step 1: Write the proportion equation
   5,256.65 : 7,254.69 = 3,928.05 : x
2. Step 2: Convert to fraction form
   5,256.65/7,254.69 = 3,928.05/x
3. Step 3: Cross multiply
   5,256.65x = 7,254.69 × 3,928.05
4. Step 4: Simplify right side
   5,256.65x = 28,496,748.78
5. Step 5: Solve for x
   x = 28,496,748.78/5,256.65
6. Step 6: Final answer
   x = 5,421.09