Finding the Fourth Proportional to 9,105.90, 12,556.83 and 8,902.23

Step by Step Solution

1. Step 1: Write the proportion equation
   9,105.90 : 12,556.83 = 8,902.23 : x
2. Step 2: Convert to fraction form
   9,105.90/12,556.83 = 8,902.23/x
3. Step 3: Cross multiply
   9,105.90x = 12,556.83 × 8,902.23
4. Step 4: Simplify right side
   9,105.90x = 111,783,788.73
5. Step 5: Solve for x
   x = 111,783,788.73/9,105.90
6. Step 6: Final answer
   x = 12,275.97