Finding the Fourth Proportional to 12,876.32, 17,636.18 and 12,119.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,876.32 : 17,636.18 = 12,119.78 : x
2. Step 2: Convert to fraction form
   12,876.32/17,636.18 = 12,119.78/x
3. Step 3: Cross multiply
   12,876.32x = 17,636.18 × 12,119.78
4. Step 4: Simplify right side
   12,876.32x = 213,746,574.10
5. Step 5: Solve for x
   x = 213,746,574.10/12,876.32
6. Step 6: Final answer
   x = 16,599.98