Finding the Fourth Proportional to 12,448.56, 17,155.36 and 8,905.62

Step by Step Solution

1. Step 1: Write the proportion equation
   12,448.56 : 17,155.36 = 8,905.62 : x
2. Step 2: Convert to fraction form
   12,448.56/17,155.36 = 8,905.62/x
3. Step 3: Cross multiply
   12,448.56x = 17,155.36 × 8,905.62
4. Step 4: Simplify right side
   12,448.56x = 152,779,117.12
5. Step 5: Solve for x
   x = 152,779,117.12/12,448.56
6. Step 6: Final answer
   x = 12,272.83