Finding the Fourth Proportional to 12,447.55, 17,153.99 and 8,904.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,447.55 : 17,153.99 = 8,904.61 : x
2. Step 2: Convert to fraction form
   12,447.55/17,153.99 = 8,904.61/x
3. Step 3: Cross multiply
   12,447.55x = 17,153.99 × 8,904.61
4. Step 4: Simplify right side
   12,447.55x = 152,749,590.89
5. Step 5: Solve for x
   x = 152,749,590.89/12,447.55
6. Step 6: Final answer
   x = 12,271.46