Finding the Fourth Proportional to 7,648.05, 10,553.90 and 4,290.27

Step by Step Solution

1. Step 1: Write the proportion equation
   7,648.05 : 10,553.90 = 4,290.27 : x
2. Step 2: Convert to fraction form
   7,648.05/10,553.90 = 4,290.27/x
3. Step 3: Cross multiply
   7,648.05x = 10,553.90 × 4,290.27
4. Step 4: Simplify right side
   7,648.05x = 45,279,059.10
5. Step 5: Solve for x
   x = 45,279,059.10/7,648.05
6. Step 6: Final answer
   x = 5,920.34