Finding the Fourth Proportional to 7,647.53, 10,553.42 and 4,290.28

Step by Step Solution

1. Step 1: Write the proportion equation
   7,647.53 : 10,553.42 = 4,290.28 : x
2. Step 2: Convert to fraction form
   7,647.53/10,553.42 = 4,290.28/x
3. Step 3: Cross multiply
   7,647.53x = 10,553.42 × 4,290.28
4. Step 4: Simplify right side
   7,647.53x = 45,277,116.89
5. Step 5: Solve for x
   x = 45,277,116.89/7,647.53
6. Step 6: Final answer
   x = 5,920.49