Finding the Fourth Proportional to 9,168.99, 12,604.56 and 7,888.20

Step by Step Solution

1. Step 1: Write the proportion equation
   9,168.99 : 12,604.56 = 7,888.20 : x
2. Step 2: Convert to fraction form
   9,168.99/12,604.56 = 7,888.20/x
3. Step 3: Cross multiply
   9,168.99x = 12,604.56 × 7,888.20
4. Step 4: Simplify right side
   9,168.99x = 99,427,290.19
5. Step 5: Solve for x
   x = 99,427,290.19/9,168.99
6. Step 6: Final answer
   x = 10,843.87