Finding the Fourth Proportional to 12,477.75, 17,213.31 and 8,445.98

Step by Step Solution

1. Step 1: Write the proportion equation
   12,477.75 : 17,213.31 = 8,445.98 : x
2. Step 2: Convert to fraction form
   12,477.75/17,213.31 = 8,445.98/x
3. Step 3: Cross multiply
   12,477.75x = 17,213.31 × 8,445.98
4. Step 4: Simplify right side
   12,477.75x = 145,383,185.93
5. Step 5: Solve for x
   x = 145,383,185.93/12,477.75
6. Step 6: Final answer
   x = 11,651.39