Finding the Fourth Proportional to 12,448.42, 17,155.20 and 8,905.48

Step by Step Solution

1. Step 1: Write the proportion equation
   12,448.42 : 17,155.20 = 8,905.48 : x
2. Step 2: Convert to fraction form
   12,448.42/17,155.20 = 8,905.48/x
3. Step 3: Cross multiply
   12,448.42x = 17,155.20 × 8,905.48
4. Step 4: Simplify right side
   12,448.42x = 152,775,290.50
5. Step 5: Solve for x
   x = 152,775,290.50/12,448.42
6. Step 6: Final answer
   x = 12,272.67