Finding the Fourth Proportional to 12,630.96, 17,410.88 and 8,645.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,630.96 : 17,410.88 = 8,645.15 : x
2. Step 2: Convert to fraction form
   12,630.96/17,410.88 = 8,645.15/x
3. Step 3: Cross multiply
   12,630.96x = 17,410.88 × 8,645.15
4. Step 4: Simplify right side
   12,630.96x = 150,519,734.37
5. Step 5: Solve for x
   x = 150,519,734.37/12,630.96
6. Step 6: Final answer
   x = 11,916.73