Finding the Fourth Proportional to 7,902.89, 10,907.04 and 7,643.27

Step by Step Solution

1. Step 1: Write the proportion equation
   7,902.89 : 10,907.04 = 7,643.27 : x
2. Step 2: Convert to fraction form
   7,902.89/10,907.04 = 7,643.27/x
3. Step 3: Cross multiply
   7,902.89x = 10,907.04 × 7,643.27
4. Step 4: Simplify right side
   7,902.89x = 83,365,397.09
5. Step 5: Solve for x
   x = 83,365,397.09/7,902.89
6. Step 6: Final answer
   x = 10,548.72