Finding the Fourth Proportional to 5,153.21, 7,724.45 and 3,918.03

Step by Step Solution

1. Step 1: Write the proportion equation
   5,153.21 : 7,724.45 = 3,918.03 : x
2. Step 2: Convert to fraction form
   5,153.21/7,724.45 = 3,918.03/x
3. Step 3: Cross multiply
   5,153.21x = 7,724.45 × 3,918.03
4. Step 4: Simplify right side
   5,153.21x = 30,264,636.63
5. Step 5: Solve for x
   x = 30,264,636.63/5,153.21
6. Step 6: Final answer
   x = 5,872.96