Finding the Fourth Proportional to 12,448.55, 17,155.35 and 8,905.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,448.55 : 17,155.35 = 8,905.61 : x
2. Step 2: Convert to fraction form
   12,448.55/17,155.35 = 8,905.61/x
3. Step 3: Cross multiply
   12,448.55x = 17,155.35 × 8,905.61
4. Step 4: Simplify right side
   12,448.55x = 152,778,770.74
5. Step 5: Solve for x
   x = 152,778,770.74/12,448.55
6. Step 6: Final answer
   x = 12,272.82