Finding the Fourth Proportional to 7,903.89, 10,908.42 and 7,644.27

Step by Step Solution

1. Step 1: Write the proportion equation
   7,903.89 : 10,908.42 = 7,644.27 : x
2. Step 2: Convert to fraction form
   7,903.89/10,908.42 = 7,644.27/x
3. Step 3: Cross multiply
   7,903.89x = 10,908.42 × 7,644.27
4. Step 4: Simplify right side
   7,903.89x = 83,386,907.75
5. Step 5: Solve for x
   x = 83,386,907.75/7,903.89
6. Step 6: Final answer
   x = 10,550.11