Finding the Fourth Proportional to 12,450.42, 17,179.96 and 7,974.60

Step by Step Solution

1. Step 1: Write the proportion equation
   12,450.42 : 17,179.96 = 7,974.60 : x
2. Step 2: Convert to fraction form
   12,450.42/17,179.96 = 7,974.60/x
3. Step 3: Cross multiply
   12,450.42x = 17,179.96 × 7,974.60
4. Step 4: Simplify right side
   12,450.42x = 137,003,309.02
5. Step 5: Solve for x
   x = 137,003,309.02/12,450.42
6. Step 6: Final answer
   x = 11,003.91